Singer Demi Lovato lands on a flight at LAX Airport on January 30, 2014 in Los Angeles, California. Rumors are swirling that the "Neon Lights" singer has gotten engaged to her on again/off again boyfriend, actor Wilder Valderrama, as she was spotted wearing a ring on her finger. Their recent tweets to each other add fuel to those rumors, with Demi saying, "to the funniest, most inspiring, incredible man I know.. @WValderrama - thank you for helping me get through my darkest moments.. You truly are a light to this world and to my life.. Happy Birthday!!!" Wilder response was equally lovey, "who needs presents when the gift of you is real to us all.. Thank you for the blessing of knowing you."