Demi Lovato is an actress.
Demi Lovato . After making her debut as a child actress in Barney & Friends , Lovato rose to prominence in 2008 when she starred in the Disney Channel television film Camp Rock and released her debut single `` This Is Me '' which peaked at number nine on the Billboard Hot 100 . The following year , Lovato was cast as the titular character of the television series Sonny with a Chance and she released her sophomore album , Here We Go Again , which became her first one to top the Billboard 200 chart . After the release of additional television films and their soundtracks in 2010 , including Camp Rock 2 : The Final Jam , Lovato 's personal issues put her career on a hiatus and led to the discontinuation of Sonny with a Chance after a second season .