Demi Lovato is a 22 year-old former Disney Pop Princess who launched a pop career that's found special success among the club/dance crowd; her followers call themselves "Lovatics." Beginning her career on Barney & Friends, Lovato moved on to Camp Rock in 2008 and finally was the star in Sonny with a Chance. After Disney, she focused primarily on her musical career. She entered rehab in 2010 following a litany of problems including alcohol abuse, cocaine use, assault, and bulimia. According to Wikipedia, Lovato describes herself as a Christian and advocates heavily for gay rights.