The singing competition was designed to counter other shows, like The X Factor, which put a premium on the look of wannabe singers rather than solely judging them on their vocal ability.

The Voice coaches, including Paloma Faith, Kaiser Chiefs singer Ricky Wilson and Black Eyed Peas star, are sat in chairs facing away from singers during the "blind auditions", but the Culture Club star admits he does take appearance into consideration during the rest of the competition.

"I know it's called The Voice but I'd be lying if I said the way someone looks doesn't matter," he told Britain's Metro newspaper.

He finds it a challenge deciding when to turn his chair around for a contestant, adding, "You don't see the backstory so it's quite unnerving making that decision. I could tell people would think 'why are they not turning for that person?'

"There were people who sounded really promising but they just didn't work out. It's almost impossible to rationalise. A lot of it is about making a personal connection - it's about sensing something in the performance."

In the blind auditions 54-year-old George constantly turned his chair around for singers, but they kept picking other coaches to work with over him, and he blames this on the generation gap as they were more aware of the younger pop stars.

The competition is now in the knockout rounds and George is busy coaching his remaining contestants and teaching them to stay true to themselves.

"The main thing is you have to teach these kids to be who they are, not who they think they're supposed to be," he added. "And to talk to them in a way that they're actually going to listen to you."