Demi Lovato Performs At We Day 2012

Demetria Devonne "Demi Lovato" is an American singer-songwriter, musician, actress and spokesperson. Her earliest roles included Angela on Barney & Friends, before she became better known for her starring roles in the Camp Rock movies.

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As Sonny Munroe in the Disney sitcom Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. She is also involved in philanthropic activities through charity work and various social and environmental causes.