On last Sunday's Xtra Factor, Cowell smirked that this year's guest singers due to duet with the three finalists were "the best yet."

May we present to you Michael Buble. Robbie Williams. And George Michael. OK, I'm excited at the prospect of seeing George, but that's partly because he hasn't seen the light of day in several years - unlike Booblay and Robbie, who've both "mentored" during the series.

Michael Buble will reportedly croon alongside StaceyOhMyGodSolomon; George will get on down with young Joe McElderry, while Robbie will act like a maniac beside an increasingly erratic Olly Murs...

This could really be something to behold. Consider the prospect of seeing Bewbleeee perving over Stacey, perhaps trying to sneak a gag on to her. I would say the same for George and Joe but the latter isn't exactly a white van man. Nay, the most likely scenario there is Joe being rooted to the spot, while George quietly rolls a coner in the corner. As for Williams and Murs, that will be a race to see who can combust first in a blaze of wild-eyed lunacy. Picture it, both of them dressed in white, Olly jitterbugging like a reanimated James Brown on crack, completely oblivious to Robbie who's still trying to emerge from behind the stage door...

What in the world makes Olly move like that? It's not a coked up ferret down his pants, that's for sure - they're too tight for that, apparently. According to sources, Olly feels a little self-aware in his snug pants: "I love wearing suits. It's just when they give me the tight trousers it's a bit off. I'd rather people were watching me for my voice and not being distracted by my other attributes."

And what might they be? Ah, he must be referring to the premature kitten off its little box on catnip he clearly had down his gusset last Saturday. Or some wild vole. Point being; minature wildlife in a state of distress, frantically gnawing at Olly's nethers, is the only feasible explanation for such juddering. Observe the YouTube footage from the 1.02 mark.

Oh and Sir Paul McCartney's also due to perform on Sunday's results show. Aces.