Demetria Devonne Lovato, professionally known as Demi Lovato, is an American singer, songwriter and actress. After appearing on the children's television series Barney & Friends (2002–2004), Lovato rose to prominence for playing Mitchie Torres in the musical television film Camp Rock (2008) and its sequel Camp Rock 2: The Final Jam (2010); the former film's soundtrack contained "This Is Me", Lovato's debut single and duet with Joe Jonas, which peaked at number nine on the Billboard Hot 100.