12. Miley Cyrus
Occupation: Actress, Singer
The former Hannah Montana was a Disney good girl, but in 2007, when Cyrus was 15, all that changed with one MySpace picture of her and a friend sharing a piece of licorice and almost kissing. In 2008, pictures of her in her underwear were leaked, and she posed topless for Vanity Fair. By 2009, at 16, Miley began accepting her bad girl persona and performed a pole dance at the Teen Choice Awards that infuriated moms everywhere. At her 18th birthday party, pictures of Cyrus with a bong were released.
Nowadays, Cyrus is killing it with how she's grown from a typical troubled teen to a confident HBIC. The soon-to-be Mrs. Liam Hemsworth is working on new music and her producer, Pharrell, says her new sound is "powerful and unexpected."