is the latest celebrity to fall victim to a supposed nude photo leak.
have claimed that they were offered a series of self-shot snaps - said to be Lovato - with the X-rated images showing a dark-haired girl in a series of 'compromising positions.'
The website adds that in the pics, 'Demi' is seen laying nude in a bath tub, while in another she is seen topless in bed.
While Radar have been unable to tell if the pictures are real, they claim that the girl does have the same tattoos as The X Factor USA
judge, including 12 black birds on her right forearm.
The person trying to sell the images is quoted by Radar as saying: "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."
It is currently unknown whether the nude images of Lovato were leaked or whether she is the victim of a cyber theft.
Demi - who celebrated her 21st birthday yesterday (August 20) - is yet to comment on the incident.