Mariah Carey saunters into London for the X Factor finale…

Well, Mariah’s not just in London for the X Factor final – she also arrived in the capital last night for some awards show where she was apparently showed off her new, slimmed down frame in a fancy red dress.

But who cares about that eh? No, we care about the fact that Mariah is apparently going to perform a brand spanking new song on X Factor this evening, when Marcus and Little Mix will be battling it out to be crowned winners of the show.

Exciting no? Well it’s exciting for us anyway. A source close to the warbling singer said:

“Everyone is really excited. Mariah will be performing a new song which hasn’t been disclosed yet. The producers are tight lipped and want it to be a surprise. Mariah has been watching the show religiously and doesn’t know who to vote for.

“She thinks all the contestants are truly gifted. She says if she could, she would have them ALL win!”

We’d bet good money on the fact that Mariah actually couldn’t give a flying f*** who wins.