So the X Factor finalists performed their new single Hero a few weeks ago and there was a lot of speculation that they had mimed their way through the song.

So tonight, they got the chance to appear on stage singing the song along with the original artist and song writer Mariah carey, and guess what? They mimed again!

How do I know? Well the lack of microphones and out of synch lip movements kind of gave it all away.

Isn’t this supposed to be a singing competition?