It looks like "Heart Attack" singer Demi Lovato maybe dating former boyfriend Wilmer Valderrama again as the two were spotted holding hands over the weekend. Apparently "The X Factor" judge and the former "That 70's Show" star quietly reconciled earlier this year.

The two were photographed on Sunday evening at the Knott's Berry Farm's Halloween Haunt celebration in Buena Park, California, according to the Daily Mail.

Lovato, 21, did her best to go unnoticed wearing a black hood in an attempt to cover her face as much as she could and paired her look with, destroyed black jeans and combat boots.

[For photos of Demi Lovato and Wilmer Valderrama holding hands at Knott's Berry Farm's Halloween Haunt celebration in Buena Park, California over the weekend click HERE]

However, Valderrama, 33, made no attempt to hide is identity from potential fans or paparazzi, the actor simply wore black jeans and a black T-shirt.

Demi Lovato and Wilmer Valderrama initially started dating in 2010 but split following reports that he cheated on the starlet several times including with actress Minka Kelly. A year later they were rumored to be seeing each other again only to break up and date other people.

In August, it was clear that the two were on good terms as the actor wished is could be girlfriend a happy birthday.

He wrote on Twitter, "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."

What do you think of Demi Lovato and Wilmer Valderrama dating again? Let us know your thoughts in the comment section below.