Demi Lovato is not a music artist.
Demetria Devonne Lovato ( [ ˈdɛmi_loʊ-ˈvɑːtoʊ ] or ; born August 20 , 1992 ) is an American singer , songwriter , and actress . Her debut album , Do n't Forget ( 2008 ) , debuted at number two on the US Billboard 200 . 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 . Its lead single `` Cool for the Summer '' was eventually certified double platinum by the Recording Industry Association of America .