Actress and singer Demi Lovato faces shame for the second time after uncensored nude photos of her were leaked online through her on-off boyfriend Wilmer Valderrama's Twitter account on Thursday.

Photos of the former Disney actress posing in the nude and others where she and her boyfriend shared a steamy kiss were posted on the latter's social networking account which was allegedly hacked.

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Aside from this, the hacker also posted a topless shot of Lovato and a Power-Puff-Girls inspired photo where he ridiculed the celebrity labeling the fat girl in the cartoon as Demi towering over the smaller girls whom he identified as Miley, Ariana and Selena.

During the cyberattack, the hacker found previously shared nude pictures of the 21-year-old singer-actress and 'retweeted' them.

Almost immediately after the leak, That 70s Show star Wilmer Valderrama informed his fans over Facebook and Twitter that his account has been hacked and eventually deactivated the latter.

Several fan comments surfaced after the reports were released where a concerned person advised celebrities to change their social networking account passwords every few months to avoid this kind of mishap. Others mocked Lovato stating that "she's not even attractive" while one even wondered why Valderrama would even have such photos in his account.

On a different note, the Daily Mail observed that the incident occurred soon after Demi's controversial presentation at the LGBT Pride event in New York where two male back up dancers shared a kiss while one of them was wearing a photo of Russo President Vladimir Putin attached to his underwear.

However, the couple remains quiet after the cyberattack.

TagsDemi Lovato, Wilmer Valderrama, nude photos, leaked