Russian roulette, LTWYL and Unfaithful are the only songs of hers that I like.

LTWYL Pt II or her on Eminems?

Her on eminems. Part two is brutal D:

OMG. Christina and Rebecca would be a dream for me. :love:

I heard that Avril Lavigne will be one of the duets.

TBH (You can tell they want Matt / Bex to win from guest stars)

Christina and Rihanna.

Robbie?? Two years running? Not very special is it?

Robbie just ******* off and die!! Seriously.

Aguilera is undoubtedly going to do a good song no matter what!

Hopefully Rihanna will play Russian Roulette with the boys..

Cher and Will I Am - probably sing check it out ? If Robbie sings with One Direction could actually make them worse I remember last year with Olly he ****ed up, I honestly thing Christina Aguilera's too good a singer to duet with some-one she'll just sing them off the stage

Christina would overshadow Cher and One Direction, so she's surely with Matt or Rebecca. I really hope Robbie isn't duetting on the final, he was a wreck when Take That performed on the results show earlier in the series, looked like he was on drugs to me, that aside he was pretty shocking and I think he would ruin One Direction's chances of winning (which, don't get me wrong, is a good thing IMO, but it's unfair on them) and would leave it up to Matt or Rebecca to win. I can't picture Rihanna/Rebecca at all, so she's surely with Matt, will.i.am is obviously going to duet with Cher if he's on... so I think Christina/Rebecca singing something like Hurt, Rihanna/Matt singing something like Russian Roulette, will.i.am/Cher singing whatever abomination he's done recently and Robbie/One Direction doing She's The One as somebody else already mentioned. Interesting... It's hard to gauge if Rihanna's current popularity would steal the win for Matt or if Christina's superior vocals would win it for Rebecca.

will.i.am should just **** off!

Wooo christina! has she ever been on x factor before? ;o

lol Robbie, yippie.... ;/ Rihanna's a slut so she can piss off to :)

I think they should make Cher do a song with THE Cher!

If Matt gets Christina he has won...especially if they perform 'hurt' together. She has a great voice, underrated.

Are these acts confirmed?

I don't think anything's fully confirmed but apparently one of One Direction confirmed Robbie?

ah ok, cheers.