Demetria Devonne Lovato ( lə-VAH-toh; born August 20, 1992) is an American singer, songwriter, actress, and television personality. After appearing on the children's television series Barney & Friends (2002-2004), she rose to prominence for her role as Mitchie Torres in the Disney Channel musical television film Camp Rock (2008) and its sequel Camp Rock 2: The Final Jam (2010). Lovato has released six studio albums: Don't Forget (2008), Here We Go Again…