Demi Lovato (born August 20, 1992) is an American singer-songwriter, musician, and actor. Their earliest roles included a part on Barney & Friends, before they became better known for their starring roles in the Camp Rock movies, as Sonny Munroe in Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. They are also involved in philanthropic activities through charity work and various social and environmental causes. As a solo musical artist, Lovato released their de...