Demi Lovato and Wilmer Valderrama Dating?

Demi Lovato and Joe Jonas have called it quits and rumors are already spreading about that Demi moving on to a new man. Wilmer Valderrama, to be exact!

Demi has denied the rumor via twitter/twitlonger and claims to be single. But a source that old E! News that "She complained about Joe to him a lot," and "Now they're talking and dating."

Demi and Wilmer's reps have yet to comment, but Demi did update her Twitter yesterday with the following: