'Harry Potter' star Daniel Radcliffe thought Justin Bieber was a woman

"Harry Potter and the Deathly Hallows" star Daniel Radcliffe admits that he is so far out of step with pop culture that he actually only heard a Justin Bieber song two weeks ago.

And, at first, he thought Justin was a woman because of his rather high voice, not because of his swooshy hairdo.

"Is he popular in England?" Daniel asked his MTV interviewer, who had no idea. "I'm so out of the loop when it comes to pop culture,' admitted Dan. "I don't even try anymore."

But Dan's totally up on Lady Gaga. "She's really amazing, she's really got a voice," he raved. "She can really sing."

Only problem is that's not Dan's "kind of music."  What, do they only play chamber music at Hogwarts?

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Video credit:: MTV