Demi Lovato is 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 .