Demetria Devone Demi Lovato is an American actress and singer-songwriter. Demi Lovato was born on August 20, 1992 in Dallas, Texas. She's 18 years old. She has an older sister, Dallas, and a younger half sister, Madison. Demi Lovato began her acting carrer at the age of six on the children's television series Barney & Friends as Angela. On Nobember 12, she realesed a music video for Remember December, her third single from "Here we go again". She is best know for her role as Mitchie Torres in the Disney Channel Original Movie, Camp Rock.