3 Miley Cyrus untamed
3. Miley Cyrus' untamed summer was the completion of her metamorphosis from a Disney star to an "adult" pop singer. The pinnacle of her rebellion, of course, was the girl-on-girl stage kiss she shared with a dancer during a "Britain's Got Talent" performance of "Can't Be Tamed" in front of a live family audience. Months later, she stirred up controversy when video of her allegedly smoking salvia out of a bong emerged.