Music fans were quick to learn Justin Bieber is more than just a sweet-voiced, mop-topped teen. This multi-talented artist is proving his staying power, through unprecedented record sales, unexpected collaborations, and a little bit of marketing magic. As Justin matures, so does his career. As we've detailed in this new book, he is branching out beyond his awesome singing power, and is not only starring in a new movie but is introductinghis own fashion line. It's clear that Bieber Fever is definitely here to stay.