Hottest 30 Under 30
13. Demi Lovato (19)
While her earliest role was on Barney & Friends, Demi Lovato got her first real start starring in the Disney channel's Camp Rock movie series. After the release of her debut album, Don't Forget, the pop star was forced to stare down her demons and eventually sought rehab to tackle her bulimia, cutting and bipolar disorder. Demi has emerged Unbroken — just like the title of her latest LP — and now she's sitting pretty, not just on the cover of Shape, but next to Britney Spears as the newest X Factor judge.