Demi Lovato and one-time BFF Selena Gomez starred on “Barney and Friends” together. In 2007, Lovato became a Disney darling, starring in “Camp Rock” with then-boyfriend Joe Jonas. In 2010, Lovato entered rehab after clocking a backup dancer in the face for ratting on her drinking and cocaine use. Lovato has been open about her struggles with bulimia, booze, cocaine and cutting and is now an advocate for staying strong. (Photo by Getty Images/Disney)
