Demi Lovato is at the centre of a naked picture scandal after images purportedly showing the star posing for nude snaps leaked online.
Fans of the Heart Attack hitmaker were shocked when the images appeared online on Saturday.
Some photos seem to show Lovato posing completely naked, while others feature her in bed with actor boyfriend Wilmer Valderrama, including one where she is seductively biting his lip.
The singer/actress hasn't explained how the pictures leaked online, but she took to Twitter.com on Saturday to post a defiant message.
Lovato writes, "Soy fuerte. Soy luchadora. Asi que no me subestimen", which translates as, "I am strong. I am a fighter. So do not underestimate me."
Soy fuerte. Soy luchadora. Asi que no me subestimen. pic.twitter.com/kwXMvkRmLd— Demi Lovato (@ddlovato) April 6, 2014