Demi Lovato is ready to fight a recent leak of photos that show her nude and in bed with on and off beau Wilmer Valderrama.

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The 21-year-old singer and former "The X Factor" judge took to Twitter Saturday to share a message that reads: "Soy fuerte. Soy luchadora. Asi que no me subestimen," which is Spanish for: "I'm strong. I am a fighter. So do not underestimate me."

The tweet came on the same day that a series of photos featuring Lovato naked under a duvet and cuddling with her ex flame, Venezuelan actor Valderrama, were leaked online.

Rumors that the photos existed began in August 2013 when the anonymous supplier told Radar Online about "the collection."

"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," the seller reportedly said.

"Then, I have pictures of her getting rowdy I can guarantee you these photos are legitimately of Demi," the person continued.

While Lovato hasn't confronted the scandal per se, she appears to have moved on from it quickly as she's continued to tweet about the upcoming Coachella music festival and the i Heart Awards since the incident.