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23rd June 2010

Daniel Radcliffe was sure Justin Bieber was a girl.

The Harry Potter star admits he struggles to keep up with current hot pop stars, but had heard Bieber's hit Baby on the radio.

I genuinely thought it was a woman singing

However, the out-of-touch Brit believed the 16-year-old's high-pitched vocals belonged to a female.

He tells Mtv.com, "I only heard Justin Bieber for the first time two weeks ago. I genuinely thought it was a woman singing.

"I'd never heard it before. "I'm so out of the loop when it comes to pop culture that I kind of don't even try anymore".

But there is one superstar the Brit can't help but notice - he's a hugefan of Lady GaGa. He adds, "I know who Lady GaGa is.

"I think she's kind of amazing. She'sreally got a voice. My God. Not my kind of music, particularly, but she can really sing". .