Daniel Radcliffe of Harry Potter thought Justin Bieber was a woman

Though Justin Bieber has thousands of devotees around the world and becomes one of the biggest pop sensations, "Harry Potter" star Daniel Radcliffe admitted he knew little about him. Not that Radcliffe didn't know Bieber is a singer but he at first thought Bieber was a woman.

During a recent interview with MTV News, Radcliffe said, "I only heard Justin Bieber for the first time two weeks ago.