Demi Lovato has never been married, nor has she had many boyfriends. She dated fellow Disney star Joe Jonas for a brief period in 2009 and 2010, but the Other stars who have endorsed purity rings include Selena Gomez, Justin Bieber, Like · Reply · 1 · Apr 8, 2013 5:06pm. Hazey Rhei. GO DEMI! WE LOVE YOU.