'X Factor's' Demi Lovato isn't dating Niall Horan - reports that she's back with Wilmer Valderrama

Wilmer Valderrama and Demi LovatoDemi Lovato has rekindled her romance with Wilmer ValderramaThe 'X Factor' USA judge - who was recently linked to One Direction singer Niall Horan - enjoyed a romantic meal with her former flame at an exclusive Los Angeles restaurant on Sunday night, sparking speculation they are back togetherAfter dinner, the pair - who dated in 2010 for several months - went back to Demi's nearby homeWilmer - who, at 32, is 12 years older than Demi - has always spoken fondly of the 'Skyscraper' singer and says he is proud of how she has overcome all the problems in her personal life Read more