Lovato back on with Valderrama?
Demi Lovato has enjoyed an evening with her ex Wilmer Valderrama.
The US X Factor judge and actor Wilmer attended a Halloween celebration in California, according to the Daily Mail.
The couple were pictured holding hands and gazing at each other at the event.
Demi, 21, who was previously linked to One Direction's Niall Horan, and Wilmer, 33, first started dating in 2010 but later split.
Earlier this year, Us Weekly reported that Demi and Wilmer were back on and i n August, Wilmer posted a 21st birthday message for Demi on Twitter, writing : 'I've been so proud of the strength & commitment you've gained 4 life, keep inspiring us all! Happy birthday my @ddlovato! With & by u always."