Demi Lovato acted on Broadway.
Demetria Devonne Lovato ( [ ˈdɛmi_loʊ-ˈvɑːtoʊ ] or ; born August 20 , 1992 ) is an American singer , songwriter , and actress . 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 .