lol @ Geri. As if she would anyway.
But eh. Typical list of fame*****s.
Would only be interested in Elton & GaGa from that list.
It's difficult to predict who would perform because so many artists wouldn't be seen dead near the X Factor, and a lot of the big names aren't even doing anything this year (Britney, Madonna, Christina, Beyoncé).
I predict an appearance from Rihanna, Katy Perry and maybe Brandon Flowers if he's doing anything major. The rest will be previous X Factor alumni