AceShowbiz -

Bad press keep coming on Demi Lovato's way while she's trying to get better in rehab. Just a day after her alleged racy pictures came out online, there's a rumor that a sex tape of her also exists. A source told X17Online that the Disney starlet is no stranger to "filming her sexual exploits" as evident from the photos she took with her friends.

The source who claimed to have worked on Demi's last summer tour said the sex tape would surface soon. The source also credited Demi's uncle Francisco Lovato in assisting the singer to have a private time with guys in her trailer. Francisco allegedly became her "chaperone", telling everyone who got near her bus that Demi was "busy" and kicking "people off the bus so she could bring random dudes on board and get nasty with them."

The story's truth is highly doubtful but rep for Demi did not immediately deny the allegation. He told Gossip Cop that he's "figuring out" whether it contains truth after all. An insider believed that the tape doesn't exist and it was just a speculation stemming from the racy photos.