Lee Hazlewood and Nancy Sinatra - Jackson

The mighty Zeppelin - Battle of Evermore

Gong - Fohat digs holes in space (and why not?)

Steve Howe/Claire Hammill - Look Over Your Shoulder

Kate Bush/Lenny Henry/Prince - Why Should I Love You

Nick Cave/Kylie Minogue - Wild Rose

and for a cheeky chaser,

Smashing Pumpkins/Nina Gordon - Said Sadly

Learnin' the Blues - Ella Fitzgerald and Louis Armstrong

Je T'aime (plume de ma tante) - Serge Gainsbourg and Jane Birkin

Bryan Adams and Sporty Spice - When You're Gone

Nick Cave/Kylie Minogue - Wild Roses

Lee Hazlewood and Nancy Sinatra - some velvet morning

Pet Shop Boys and Dusty Springfield - What Have I Done To Deserve This?

Ike & Tina Turner - River deep, mountain high. (OK, I know its only her on the record, but I do like it so much)

& yes, I know I cant count.

Gram Parsons and Emmylou Harris - We'll Sweep Out The Ashes In The Morning

Gimme Shelter

REM with Patti Smith - E-Bow The Letter (topical)

bubbling under Morrissey and Siouxsie - Interlude

There's a Story in Your Voice - Elvis Costello & Lucinda Williams
I Got You Babe - Sonny and Cher
Handle Me With Care - Jenny Lewis, Ben Gibbard and Conor Oberst

I'd venture to suggest the best ever, for my money.

Nick and Kylie - Where The Wild Roses Grow

Otis & Carla - Tramp

Bob & Marcia - Young, Gifted & Black

EDIT: Ok, since everyone else has had Nick & Kylie, I'm going to go for...

Shane & Kirsty - either the obvious one, or Miss Otis Regrets/Just One Of Those Things

There's A Story In Your Voice - Elvis Costello & Lucinda Williams
Only You Know And I Know - Delaney & Bonnie (& Friends)
Meet On The Ledge - Fairport Convention

Joss Stone & Mick JaggNNNNNNNNOOOOOOOOOOOOOO!!!!!!!!!!!!

PJ Harvey and Thom Yorke - This Mess We're In

Kristin Hersh and Michael Stipe - Your Ghost

Carly Simon and Mick Jagger - You're So Vain

By Johnny and June.
The whole soundtrack of One From The Heart, with Tom Waits and Crystal Gayle.
Dead Ringer For Love.

.... You're All I Need To Get By
Gram Parsons and Emmylou Harris - Love Hurts
Shane MacGowan and Kirsty MaColl - Fairytale of New York

Beat that

Beth & Ryan

Mickey & Silvia

With the added bonus that Sylvia Vanderpool then went on to found Sugar Hill Records

2 more to qualify?

How about...

Roberta & Donny

Percy & Sandy

Glen & Marketa from the film "Once."

and Dr Robert "Wait"

Edit: Top 3? Just play this 3 times....

Edit 2: Thought of two more 80's gems

Aretha and George "Knew You Were Waiting"

David Grant and Jackie Graham "Could It Be I'm Falling In love?"

1. Lucky Stars - Dean Friedman

For a long time I thought Woody Allen sang this.

2. Opposites Attract - Paula Abdul & MC Skat Kat

"Who'd a-thought (uhhh!) we could be lovers
She makes the bed
And he steals the covers"

Just to clarify, this is a woman and a cat.

3. Rockin' Good Way - Shakin' Stevens and Bonnie Tyler

Don't mess around! Don't mess around!

How 'bout Percy & Alison?

Rosie & Sufjan with THE best version...

Stevie & Don anyone?

Alison & James...

Evelyn Evelyn album by Amanda Palmer and Jason Webley
plenty of Decemberists including:
Sunshine,
Yankee Bayonet and
The Hazards of Love (Wager All)

Iggy & Debbie - "Well, Did You Evah" (it was swelligant!)
Peter & Kate - "Don't Give Up" (possibly La Bush's greatest vocal)
Tindersticks feat. Carla Torgerson - "Travelling Light"

Renee and Renato - Save Your Love

Arthur and Hilda - You're The One That I Want

Abi and Esther - Cinderella Rockefeller

(You never said they had to be good)

PSB & Dusty - What Have I Done to Deserve This
Bryan Adams/Mel B - When You're Gone
Joe Jackson/Elaine Caswell (if this counts) - Happy Ending. Completely OTT 80's style thing, but I can't help but love it!

Heard 'Love has finally come at last' - Bobby Womack & Patti Labelle - the other day and it made me cry (just as it does every time). There are no other two offerings in the same league to match its power and blister. IMHO.

Some wry, dark humour from the Magnetic Fields

Some wry, dark humour from the Magnetic Fields

William Bell & Judy Clay - Private Number
Joe Cocker & Jennifer Warnes - Up Where We Belong
Supremes & Temptations - I'm Gonna Make You Love Me

Ricky Lee Jones

Chevalier, Gingold

Carreras, Kanewa

And does this count?

Lulu and Bowie

Not sure if this track is particularly Word friendly, but I love it.

Meatloaf & Ellen Foley (?) - Paradise by the dashboard light.

Sorry, cant Post clips, I am at work.

male + female comedy duet. Even the, ever professional, Bowie cracks up (at 1.28).

Take your pick of fave song, but 3 albums worth of gems.

Marvin & Tammi - Good Lovin' Ain't Easy To Come By
Marilyn McCoo & Billy Davis - You Don't Have To Be A Star
Mamas & Papas - Twelve Thirty

Jackson by Nancy & Lee on the subs bench.
It's not their most well known but I think Good Lovin' is M&T's greatest performance as a duo (Val Simpson sometimes sat in on the later M&T records when Tammit was ill and there is a school of thought that it's her on this but I don't buy it - that is Tammi Terrrel).
RIP Nick Ashford.

Alice Cooper & Betty Wright – No Tricks
Jackie Leven & Deborah Greenwood – Song for Bass Guitar and Death
Godley and Crème, Sarah Vaughn - Lost Weekend

...but I reckon you can't go wrong with these:

The Pastels - Nothing To Be Done
Alison Krauss/Dan Tyminski - The Boy Who Wouldn't Hoe Corn
David Sylvian/Virginia Astley - Some Small Hope

I also Like Tindersticks Travelling Light
and Kate and Peter Don't Give Up

Gigi D'Agostino - L'amour Toujours

Brad Paisley & Carrie Underwood - Remind Me

Manic St Preachers - Little Baby Nothing

Fools - the Only Ones (Peter Perrett and Pauline Murray)
Love Has Finally Come at Last - Bobby Womack and Patti Labelle
The Wild Goose - Kate Rusby and Dave Burland

Not enough Nancy and Lee for my liking, so:

Arkansas Coal - Nancy Sinatra and Lee Hazlewood
Crying - kd lang and Roy Orbison
The Case Continues - Ute Lemper and Neil Hannon

Stevie Nicks and Tom Petty - Stop Dragging My Heart Around

Brook Benton and Dinah Washington - Baby You've Got What It Takes

Peter Gabriel and Kate Bush

You're still standing there - Steve Earle and Lucinda Williams
In spite of ourselves - John Prine and Iris DeMent

Yeah?

When the voices meld (horrible word to describe a nice thing) it's a very sweet sound, viz

Ella Fitzgerald & Louis Jordan - Baby, It's Cold Outside

Beth Rowley & Duke Special - Angel Flying Too Close To The Ground

The Civil Wars - Poison & Wine

Sub : Patti Labelle & Michael McDonald - On My Own

First time post but had to mention Wyclef Jean & Mary J Blige - 911

Manic Street Preachers/Nina Persson - Your Love Alone (Is Not Enough)
Pogues/Kirsty MacColl - Faiytale Of New York
(a bit seasonal, a bit overplayed, but still a bloody good song)
Debbie Harry/Iggy Pop - Did You Evah?

End of debate.

Stranger Cole & Patsy Todd - Down By The Trainline

Section 25 - Looking From A Hilltop (Megamix)

Felt/Elizabeth Fraser - Primitive Painters

Indigo Girls/Michael Stipe - Kid Fears

Richmond Fontaine - Post To Wire

Low - Two Step

Me In Honey : REM and Kate Pierson
Future 40's : Syd Straw and Michael Stipe
A Heart Needs A Home : Richard and Linda Thompson
Guilty By Association : Joe Henry and Madonna

This has never been released on record as a duo, although they both Steve and Emmy put it on their own records (Train A Comin' & Wrecking Ball).

I saw them do it at one of the Concerts For A Landmine Free World and it was the highlight of the evening.

I think one of the great OGWT performances came from Kris Kristofferson and Rita Coolidge

One of my favourite duets is Allison Moorer's No Next Time from her album The Hardest Part which is performed with Lonesome Bob. Even though it's also on the DVD from her Play live album it's not on YouTube.

Glaring omission!

Bjork and Anthony Hegarty - "Dull flame of desire"

Was Mystery Jets and Laura Marling - Young Love

And more..

The Sugarcubes - Deus
The Pastels - Through Your Heart
Lush with Jarvis - Ciao

Two guys and one girl, Nickel Creek , Why Should the Fire Die.

Obviously it's illegal not to include RT. Sadly, I can't find Richard and Linda doing the wonderful Wall Of Death; but I did find RT singing it with the divine Christine Collister, so here it is:

And, as it must be over year since I last posted it, here's Cock Robin with The Promise You Made, this time a live version, with Anna La Cazio going nuclear in the hotness stakes...

John Prine and Bonnie Raitt 'Angel From Mongomery'
Tom Russell and Gretchen Peters 'Billy 4'
Gram Parsonms and Emmylou Harris 'Hearts on Fire'

None better

Frankie and johnny i'll hold you(northern soul monster very big at Wigan casino in the 70s, urge you to YouTube it) marvin and tammi,anything.

Maggie Bell (Featuring Rod Stewart)

Dolphins - Beth Orton & Terry Callier

See The World - Vinegar Joe (Robert Palmer & Elkie Brooks)

I never heard the Beth Orton version of Dolphins before playing that clip and it's blindin'

My 3....

Lydia Lunch and Roland S Howard - Some Velvet Morning
Nicole and Timmy Thomas - New York Eyes
Shane McGowan and Sinead O'Conner - Haunted (this song doesn't seem to be too well known, well it took me an to track down a few years ago anyway and remains the only song I have ever downloaded without shelling out as none of the legit sites had it at the time)

1) Crawl Home - Queens of the Stone Age and PJ Harvey
2) Some Velvet Morning - Lee Hazelwood and Nancy Sinatra
3) Look At Me When I Rockwitchoo - The Black Kids

This was in my top 5 records when I was 17 and probably still is.

A little maudlin but great vocals.

This popped into my head - haven't heard it for years.