Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American child actress and singer/songwriter. She began her career on the children's TV Show, Barney. She is best known for her role as Mitchie Torres in the Disney Channel Original Movie Camp Rock. She has two album out (Dont Forget, and Here We Go Again). With her leave from Sonny With A Chance, she is now focusing on her music career.