Singer Michael Bublé is apparently fuming with online critics who claimed that he was miming during hisperformance on The X Factor last Saturday.

The star was shocked by the allegations.

He told Scott Mills on Radio 1: "People, whoever you are, if you're writing on these blogs or whatever, if you think that I'm miming, you're an idiot. You're so used to being fed crap and you're so used to seeing people jam microphones in their faces because they're lip synching, that when you see somebody using actual mic technique and move a microphone away.

“It's crazy, I'm shocked. Did they not listen to me? I was flat! I sang flat! And I was out of breath. If I was going to lip synch, wouldn't I just do it to my recording?"