There's something about Wembley Arena that seems to make or break an X Factor contestant but, in fairness, if you can't get comfortable singing in front of an audience of thousands how on earth are you ever going to survive in the music business? As Gok Wan would say, it's all about the confidence, and that's precisely what Sharon, Nicole, Louis and Gary are after now that they're out of that less than ominous sounding 'room'. Wonder how many sob stories we'll get this evening?