Apparently the duets are as follows
 

Paul McCartney to sing with Olly (We can work it out)
George Michael to sing with Joe (Dont let the sun go down on me)
Chris Martin (Coldplay) to sing with Stacey (Clocks)

Kylie Minogue has also been rumoured. Beyonce and Madonna are also apparently singing at the final, but by themselves.

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Paul McCartney, Robbie Williams, Michael Buble & George Michael all on the #xfactor final
7 minutes ago from TweetDeck

omg this will be amazing!! So looking forward to staceys now!

Harry will be happy!

Should be good!

paul mccartney YES

Yep I will be woop!

Nothing's confirmed though, so don't get too happy. lol

Hmm, not particularly biased towards any of the contestants then really.. Olly's at a slight disadvantage I think.

omfg,, i SO nearly said George Michael to sing witthh Joe!!! :D

Oh ffs LOL

Paul McCartney, Robbie Williams, Michael Buble & George Michael all on the #xfactor final
7 minutes ago from TweetDeck

They usually get exclusives like song choices early and stuff. (xfactorupdates)

Can't see it really, happened last year JLS were supposed to be with Rihanna and ended up with Westlife :/

Hope they get good people on though.

Rihanna dropped out last year though tbf.

This is very bias, allowing Joe to sing a song he has already done (Which we all know he can ace). I like Joe but its such a set up for him to win. :nono:

Looking forward to them all :) Staceys inparticular, love that song :D

I heard it was Miley Cyrus with Stacey. It could be true because I saw a interview with her yesterday and she said she's after buying an apartment in London because she's staying a while.

Yessss!

They are rubbish... Beyonce last year, George Michael this year?! Wtf?

Don't see how Olly would do We Can Work it out with Mccartney

cause the version olly done was stevie wonders, the style that suited him more

so I don't reckon that ones true

on the other thread it says olly is dueting with robbie

he is this thread is wrong

but then again it could all be wrong nothings been confirmed yet

You could always flip it round, Boyzone last year, Sir Paul this year ...

but Beyonce was by far the most entertaining last year

Yay beyonce!!!!!!

Thats pretty awful..

i don't even like paul, george and robbie bleh.

Stacey is singing with Paul McCartney isnt she?

Olly's also done We Can Work It Out.