Demi Lovatophoto by Paige’s Concerts wiki: Demetria Devonne “Demi” Lovato (b.8/20/92) is an American singer, songwriter, and actress.  She was born to former Dallas Cowboys cheerleader Dianna De La Garza (née Lee Smith.) Her mother is of Irish descent. Her father, Patrick Martin Lovato, was an engineer and musician who passed away in 2013. He was of Nuevo Mexicano descent, with mostly Spanish…