Demi Lovato & Wilmer Valderrama Attend Halloween Party Together? (PHOTO)

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Demi Lovato hit up a Halloween party in Los Angeles over the weekend — and it seems she crossed paths with her famous ex, Wilmer Valderrama. According to tweets from onlookers at the party, both stars had a fun evening.

Photographic evidence shows Demi posing with her two gal pals at the Halloween bash, and it appears (though not confirmed!) that Wilmer was photo bombing the shot! The two stars didn’t tweet about reuniting, but TV producer, Billy Clark wrote:

Great seein yall 2nite @Willyville @ddlovato. Will, Lets get up this week budd. DL, didnt get 2 say bye & take care of my girl @ShariShort11.”

The two were spotted getting affectionate in a club in late January, but according to Us Weekly the couple started dating ever since Demi split from Joe Jonas in May of 2010. Demi, 18, and Wilmer, 31, officially split in June.

Do you think that is Wilmer in the pic? Do you think these two are friendly exes or giving their romance a second chance? Sound off in the comments below!