Favourite Joe McElderry, Olly Murs and Stacey Solomon will be duetting with three huge stars from the world of pop.
Joe will be paired with George Michael. Olly's set to sing with Robbie Williams and Stacey's with Michael Bublé.
As if that wasn't enough, Sir Paul McCartney will also reportedly make an appearance and perform a track during the show.
Robbie Williams was the special guest mentor back in October when the X Factor theme was Musical Heroes. He showcased his comeback track Bodies but the reaction was mixed. An X Factor insider told the Daily Mail: "Everyone has a lot of love for Robbie and it would be a fantastic conclusion to the series if he came back and did an immense performance. I have a feeling it would also lay some of his demons to rest."
If the correlation of X Factor winner/biggest guest star comes into play, Joe's got it in the bag. In 2008, Beyoncé sang with Alexandra Burke and who can forget Kylie Minogue's sizzling duet with 2007 winner Leon Jackson?