Robbie Williams has admitted to undergoing surgery to improve the thickness of his hair.

The star has a home in Los Angeles and quipped to Graham Norton that being around so much cosmetic surgery made him give in to the craze.

"I've lived in LA for a long time and they say, 'If you sit in a barber's shop for long enough you will get a haircut'. Well, if you live in Los Angeles for long enough you're going to get some surgery. I've had the thatch done and I didn't even need it. That's the weirdest thing. I had three months off and got bored."