[Tom]

Assuming its the same format as series 3 and 4, then its a Christmas song, a duet and a repeat performance. The guests are according to wikipedia (not reliable I know), Beyoncé, Boyzone and Take That.

Alexandra should do Listen, and although Beyoncé would be the obvious choice to duet with her, I think it should be Take That otherwise, its going to be 2 boybands on stage at once. JLS should go with Beyoncé and Eoghan should be lumbered with Boyzone (or the other way around depending how you look at it).