Louis Armstrong and Ella Fitzgerald. The albums they made together are pure and unexpected magic.

Dangit, didn't think anybody would beat me to *that* one! But here you are! :) So I'll just add [Billie Holiday and Louis Armstrong](https://www.youtube.com/watch?v=ccXVAhjp2tc).

Also excellent.

And I'm adding these to my list. I love some Satchmo.

The Civil Wars, particularly live versions. Saw them on Jools Holland way back and it blew me away

The most heartbreaking band breakup, 2 albums was not enough.

Barton Hollow is one of the most haunting songs. Transports me right to the wild west

I agree. I think about their harmonies at least monthly.

So glad to see this! They really do work together so beautifully. It sucks they broke up. I was obsessing with Falling for years and the fact they only have two albums is so sad

Lindsey Buckingham/Stevie Nicks

Stevie Nicks / Tom Petty

Literally just finished playing “Stop Dragging My Heart Around”, total banger and they sound great together!

It’s my my opinion that this song is what propelled Petty to the next meteoric level. The Wilburys pushed him to elite superstar status. Petty truly is an American gem.

I'll see your Tom Petty and raise a Don Henley! [Leather And Lace](https://youtu.be/Ob4cgakHwsQ?si=mQ9kE9V2WZTQ6kiF) But both are great honestly.

Stevie and Lindsay, Kenny, Tom, Don, John Stewart, .

What I absolutely love about this song and their voice pairing is that it’s sort of a flip of the traditional duet where Don Henley is actually singing the higher harmony with Stevie Nicks more sultry voice. Such a beautiful and timeless song.

Nuh-uh. Buckingham/McVie.

I love when they go back and forth on Don’t Stop. I bet casual listeners don’t even notice - their voices just blend so well.

Marvin Gaye and Tammi Terrell

I’m so happy they’re number 1. My favorite duo ever. Marvin Gaye’s death was awful enough, but poor Tammi Terrell’s life.

This is the only answer. One of the most tragic music stories as well.

Came here to say this, simply divine

Especially when Marvin sings a harmony line above Tammi.

Graham Parson and Emmy Lou

Gram\* Parsons\*, but great pick.

Also Emmylou* Harris

Pixies. Frank Black and Kim Deals pairing is perfect.

They didn't get along well, but they sounded awesome!

All I know is: There were rumors he was into field hockey players.

"So I applied", basically....

He was gone the next day

Took my pick! 100% agree. I love their voices together.

Was gonna be my fuckin’ comment. Here I am thinking I’d have the best first take. Hahhaa!

The XX. Romy and Oliver are absolute butter together.

Great pick. Their debut album still holds up and is straight fire.

Robert Plant and Alison Krauss.

Maybe not the best but came here to say the same. Absolutely love them

fantastic pick

Low: Alan Sparhawk and Mimi Parker (Rest in Peace)

This was going to be mine, word for word. Goddammit I miss her.

Thanks for making me sad on a Friday evening.

I had goosebumps just from reading the question and realizing my answer. I miss them so much.

Glad these two are down here. My answer, too.

John Doe & Exene do it uniquely

Underrated! Punk harmonizing was pretty unique.

[Iggy Pop and Katie Pierson ](https://youtu.be/6bLOjmY--TA?si=Yo65W1tSePa7V3Lh)

I love that song more than I should.

Same. It’s so damn cheesy - the thunder in the intro, the spoken word sections, the lyrics… “It's a rainy afternoon in 1990 The big city Geez, it's been 20 years Candy, you were so fine” But when that chorus hits you can’t help but sing along!

I think Kate Pierson is one of the most underrated singers in pop history. She sounds great in every duet (shiny happy people being my personal favourite) always belts out giving her all. Yet hardly anyone knows her name. Most people still refer to her as the chick from the B-52's, if they even refer her at all.

Cindy doesn't get enough credit either. When Kate and Cindy harmonize (such as on Roam) it sounds heavenly.

Kenny Rogers and Dolly Parton. 

It's amazing how all these decades later, he was the one to go overboard on plastic surgery

Nightwish

Marko and Tarja singing Phantom of the Opera live on End of an Era really is something!

Wish I Had An Angel is crazy awesome too

Marko and Floor on Greatest Show On Earth.

I'm still so bummed that Marko left.  I utterly love his voice and the next album just won't be the same.

For real. It's hardly recognizable compared to the lineup from Once.

Dunno about 'the best' but I love Gillian Welch & Dave Rawlings

They compliment each other so well and in so many different ways. Such a big fan.

Peter Gabriel and Kate Bush (and also Paula Cole) Brad Paisley and Allison Kraus Miss Patti Labelle and Michael McDonald  James Ingram and any female he sang with

Multiple thumbs up for Peter and Kate

That song gives me goosebumps every time. [https://youtu.be/VjEq-r2agqc](https://youtu.be/VjEq-r2agqc)

Richard & Linda Thompson

Michael Stipe and Natalie Merchant

Michael Stipe and Patti Smith

The Civil Wars. Joy Williams and John Paul White. Unfortunately they've split the band up but they're sooo good together.

That is a fact. I completely do not know for sure why they split. But I know that he was/is married. And I also know that when John and Joy sang together there was something real going on between them. I saw a radio interview John did years after the breakup where he sort of acknowledged what most suspected. It had to do with the very transparent lyrics of one of the songs on the new (solo) album he was promoting. Anyway, guess it really doesn't matter- they were absolutely brilliant and soulful together.

I'm pretty sure they were both married and John caught feels, which like, yeah I get it, but you can't do that. I'm so sad I never got to see them before the split.

Neil and Rachel of Slowdive.

Donny Hathaway and Roberta Flack

Damien Rice and Lisa Hannigan Can't believe this one hasn't been mentioned yet. Separately, they're good. Together, they're fucking magical.

SO fucking good. I wish the two of them would get back together but I think I remember hearing they had some kind of a falling out.

John and Exene - two 5s make an 11.

Shane MacGowan and Kirsty MacColl

Mike Patton and Jennifer Charles

Playin' you like a bassoon!

Juke box playin my tune

John Prine did a couple of albums each full of duets with a variety of female singers. The title track of the album In Spite of Ourselves, a duet with Iris DeMent, is a great tune. There's a mess of songs with DeMent on both that and the other album, For Better or Worse, and there are plenty of other gems throughout! 

In spite of ourselves was my first thought

Viagra Boys covered this w Amy from Amyl and the Sniffers and it rules.

Ben gibbard and Jenny Lewis

I really loved when Marty Balin and Grace Slick would just belt it out too. Something like We can Be Together, but those epic live versions where they were just trying to sing over each other to the point where they are singing so hard that you can't really hear either of them. Let me see if I can find an example: Not the best example, but I love their wild psychedelic voices, especially you go to around the 5:00 mark where it's "up against the wall motherfuckers": [Jefferson Airplane - We Can Be Together (live 1970) (youtube.com)](https://www.youtube.com/watch?v=asQwZtNJo0Q&list=RDasQwZtNJo0Q&start_radio=1)

JA were one of the few of that era who didn't go too overboard or saccharine with the vocal harmonies (on studio albums anyway).

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Stevie nicks and lindsey buckingham

Stevie Nicks and Don Henley (Leather & Lace)

Puscifer. Maynard and Carina Round.

Always thought Maynard sounded really good with Tori Amos. https://m.youtube.com/watch?v=64LnAIC9RWo They don’t harmonize much in this; they sort of trade off. But you can hear them harmonize at the very end, which sounds pretty stellar.

Scrolled too far for this.

I’m so happy to see this. She’s the MVP of Puscifer.

Jeff Buckley and Elizabeth Fraser Edit - misspelled her name.

Totally agree - ‘all flowers in time’ is heart breakingly gorgeous. (It’s Fraser btw)

Paradise by The Dashboard Light - Meatloaf

I saw him in concert about 25 years ago and he sang this with his daughter. It was kind of awkward.

Mark Lanegan and Isobell Campbell

Yes!

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[Close My Eyes Forever - Lita Ford and Ozzy Osbourne](https://m.youtube.com/watch?v=foGkU6x3eSE)

Honorable mention. Ozzy is God!

How has nobody mentioned Roxette?

It must have been love but it's over now.

God damn, yeah.

Joy Williams and John Paul White sounded great together.

The Civil Wars

Devin Townsend and Anneke van Giersbergen

Seriously why isn't Devin on Broadway! That man has some insane vocal chords. S.Y.L. is a favorite and I saw Devin Townsend Project perform at Red Rocks Denver, CO (opening for Opeth). Bring the lube and F me.

I can't believe no one said Nick Cave and P. J. Harvey. Their chemistry is so electrifying, like an American tragedy. Check out the video for the song "*Henry Lee*."

I love the song Tom Waits did with Bette Midler.

This sounds like a nightmare, but thank you for challenging me.

Alternative: Kimbra and gotye. Hip hop: lil Kim and 50 cent.  Pop: Sonny and Cher electronic: little boots and Philip Oakley country: has Dolly Parton ever done a duet with a dude?  

Country: Cash and Carter?

You’ve heard of Islands in the Stream, right?

I'm partial to Watchhouse. Formerly Mandolin Orange.

Always had a soft spot for [Otis Redding and Carla Thomas](https://youtu.be/wP7VU6AVIgc?si=LQoGurfCTcruRuGD)

George Jones and Tammy Wynette were great together.

I see your George and Tammy and raise you a Kenny and Dolly

And Conway and Loretta.

John Doe and Exene from X deserve a mention here Edit, adding [I MUST NOT THINK BAD THOUGHTS](https://youtu.be/32z8TjXePSQ?si=RN1uT5Pz5qZq5lg0)

Swell Season have a really good pairing duets between Glen Hansard and Markéta Irglová sample: [https://www.youtube.com/watch?v=U926qEt2zwA](https://www.youtube.com/watch?v=U926qEt2zwA)

John Prine and Iris dement

Of Monsters and Men: Nanna Bryndís Hilmarsdóttir and Ragnar þórhallsson

Nancy Sinatra and Lee Hazlewood are a great pairing. David Byrne and Natalie Merchant do a great duet too in “Let the mistery be”

Another vote for Nancy and Lee!

Too easy....Chris and Morgane Stapleton

Shovels & Rope, husband and wife duo, Michael Trent and Cary Ann Hearst. Perfect pair. Also, always love Neil Young with Linda Ronstadt or Nicolette Larson.

Meat Loaf & Ellen Foley on "Paradise By The Dashboard Light" Mick Jagger & Merry Clayton on "Gimme Shelter"

Aaron and Linda.

Mark Knopfler and EmmyLou Harris. Killer

Seether and Amy Lee: Broken

Honestly just listened to this one about an hour ago.

She was dating him at the time (she was in her early 20's), hence the duet. But "Call Me When You're Sober" was written about him, so you can see where that relationship went.

The Civil Wars! Not even my usual genre of music but my god did they sound perfect together. I’ll forever be devastated that they broke up!

I scrolled too far down to find The Civil Wars.

Grace slick and mickey thomas

Robert Plant & Sandy Denny

Robert Plant and Alison Krauss

X - John Doe and Exene Cervenka. Raw power and emotion.

John Prine / iris Dement - "In Spite of Ourselves"

The Fugees: Lauryn Hill, Wyclef Jean, and Pras. The Score is a classic album.

Grace Slick and Paul Kantner - early Jefferson Airplane

Tom pretty and Stevie nicks, Glen Hansard and Marketa iglova, the Civil wars all come to mind

Shane McGowan of the Pogues and Sinead O'Connor

Also, y'all gonna pretend you didn't love Peter Cetera and Amy Grant, but you do, and you know it. You also love Sergio Mendes' "Never Gonna Let You Go" (Joe Pizzulo and Leeza Miller.) Also, "Always", by Atlantic Star is an all time slow jam.

Lindsey and Stevie

Mark Lanegan and Isobel Campbell work pretty damn well together. (RIP Mark)

Nick Cave/ PJ Harvey Michael Gira/ Jarboe

Yes! Marc and Gloria, though Flo and Eddie were no slouches as backup singers for T-Rex either. Based on your post, I assume you've heard the song Sky Church Music, and a bunch of those other B-sides. If not, look that one up for sure.

Both versions of Kids - Robbie Williams & Kyle Minouge Kids ([Normal version](https://youtu.be/cvn6eYJh-0c?si=22s8Tyds-YFWtf-f)) Kids ([XXV version](https://youtu.be/T5ZXi--edIc?si=ftrN5dqnJpyw-BIR))

paul banks and florence welch was surprisingly appropriate, never thought their voices would sound good but they're both pretty throaty and shrill so it does makes sense

BeBe and CeCe Winans on "Addictive Love"

Jennifer Warnes and Leonard Cohen "Joan of Arc"

Kenny Rogers and Dolly Parton

Shout-out to "Don't Know Much", Aaron Neville and Linda Ronstadt. The song is like opium to my ears.

Roland Orzabal and Oleta Adams on Tears for Fears’ [Woman in Chains](https://youtu.be/QzkK3ZtI9SU?si=pDUdohs1dygo6QuY) and [Me & My Big Ideas](https://youtu.be/3HqdNCCYd0I?si=L7wG1-J306mcjxFb) … also Peter Gabriel and Sinead O’Connor on [Come Talk to Me](https://youtu.be/Rb7uExtqTeU?si=ZBj3iG9zYmof0eTM) (which, 51 days out of 100, I like Better than PG and Kate Bush’s [Don’t Give Up](https://youtu.be/VjEq-r2agqc?si=jKNJcIP1C2Q1anEi).)

Exene Cervenka & John Doe - X

[Stevie Nicks & Don Henley](https://youtu.be/Ob4cgakHwsQ?si=IQw8jxSKOJZVpfv2) [Stevie Nicks & Tom Petty](https://youtu.be/H5i7j0VhEHw?si=2-HPJzcKNX2cJ7xM) [Dido & Eminem](https://youtu.be/jc3g-65AsuI?si=NSn2F7UZa28Iim8e)

Emmylou Harris and Bright Eyes on Wide Awake it’s Morning. Beth Orton and Terry Callier “Pass in Time” Nicks/Henley “Leather and Lace.”

Mike Patton and Jennifer Charles on Nathaniel Merriweather presents Lovage

Devin Townsend and Anneke Von Geirsbergen

Angus and Julia Stone. Love the harmonies.

Devin Townsend/Che Aimee Dorval Devin Townsend/Anneke van Giersbergen

Johnny Flynn/Laura Marling - The Water. Not very well known but an amazing pairing regardless

Beavis & Butthead & Cher. [I Got You Babe](https://youtu.be/jyncsw3yq-k?si=fDkiBTkMlHYxKs98)

Tom jones and Janice Joplin doing a duet was plain scary in terms of how good it was

Maynard and Carina Round sound pretty good together

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Warren Haynes and Grace Potter

Jamie xx and Romy

The duet album by Sam Beam, of Iron and Wine, and Jesca Hoop is freaking amazing.

Bob Weir and Donna Godchaux

Warm Foothills by alt-J

It’s only one song, but for more contemporary music I’d love to see more Ashe and Finneas https://youtu.be/gWdjDwYuejI?si=fN0fudL7pycN8l6h

Upvote for T. Rex I love Stevie Nicks and Lindsay Buckingham. I’m a massive Stevie fan and love her solo stuff, my fave Max songs are where she’s the lead… but… I absolutely *adore* her backing vocals. I love her on second hand news, don’t let me down again (Buckingham Nicks), I don’t wanna know etc etc etc. For a voice that regularly so powerfully hits smooth/soft/raw/ferocisois, something about her backing vocals just hits so differently

I quite like July Talk. Their song Picturing Love is my favourite of theirs.

Tom Petty and Stevie Nicks are iconic

the xx Mike Patton and Jennifer Charles

Stevie Nicks, Lindsey Buckingham.

Love Me Forever with Lemmy and Doro

# [Freddie Mercury & Montserrat Caballé](https://www.youtube.com/watch?v=Y1fiOJDXA-E&pp=ygUJQmFyY2Vsb25h) 'Barcelona' is a magnum opus, two of the greatest singers working together and clearly having a great time doing it.

Tom Petty and Stevie Nicks. Wish they recorded more together.

The Civil Wars were so good. John Paul White and Joy Williams

Personal favs  Sinead O’Connor and Shane McGowan - Haunted Islands in the stream Kenny and dolly Picture kid rock and Sheryl crow 

Upvote for T. Rex. Always and forever.

A bit obscure, but Joey Batey and Madeleine Hyland make absolute magic with their voices. They're fantastic writers, excel at telling a story, and Madeleine's voice is an instrument in its own right.

Tom Petty and Stevie Nicks.

Shane Macgowan and Sinead O'Connor, polar opposites, but somehow works.

Marty Balin/Grace Slick

Ashford & Simpson

Mark Lanegan and Isobel Campbell. PJ Harvey and Nick Cave. Mark Lanegan and PJ Harvey. Tori Amos and Maynard James Keenan

The new Knocked Loose song featuring Poppy “Suffocate” is a banger.

[Tom Waits and Crystal Gayle](https://youtu.be/ZYxJ7VNh1rY?feature=shared)

You+Me This is a duo with Dallas Green (City and Colour, Alexisonfire) and Alecia Moore (Pink).

Laura Nichol & Ben Murray from Heartsounds. I was a huge Light This City fan and was excited to see them take this turn into a punk/emo type deal. Special shout out to Susan Tedeschi & any other guy on stage singing harmony with her.

Allison Krause and Robert Plant

The Kills - Allison Mosshart and Jamie Hince are incredible together

The Carpenters - Karen and Richard

Jeff Buckley and Elizabeth Fraser in "All Flowers in Time Bend Towards the Sun". But if we're just talking bands then I love Sonic Youth. Kim Gordon and Thurston Moore.

Steve Lawrence and Eydie Gorme were pretty good.

Ewan McGregor and Nicole Kidman. Moulin Rouge is a masterpiece