Several explicit pictures of actress-singer Demi Lovato are reportedly circulating online. According to Radar Online, "multiple X-rated and self-shot" images of the X Factor judge were offered for sale to the website.

The photos show a dark-haired woman who looks identical to Lovato in various compromising positions, including some in which she is naked in a bathtub and others where she is lying topless in bed. Although the celebrity gossip website hasn't been able to verify the images as authentic, the woman in the photos supposedly has the same tattoos as Lovato including "12 black birds on her right forearm."

"These are Demi. The collection I have show some nude, including face, some including parts of the body Demi is known for — tattoos, butt, chin. Then, I have pictures of her getting rowdy… I can guarantee you these photos are legitimately of Demi," the person who attempted to sell the images told Radar.

Lovato had pranked fans last year, where she claimed that her Twitter account had been hacked and a naked photograph of herself had been posted online.

"Demi's twitter is hacked," she tweeted, adding, "Want to see Demi naked? Here it is..."

She then posted a picture of a nude Barbie doll with her head photoshopped on top.

"Hahahahahahhaha I'm sorry y'all... But I had to... GOTCHA!!