Demi Lovato took to Twitter to let the world know that she is staying strong despite dealing with an alleged nude photo scandal. On Apr. 4 racy pictures of Lovato and her boyfriend Wilmer Valderrama were leaked on the Internet.

In some of the photos the "Neon Lights" singer was seen seductively posing under blankets, making out and licking her boyfriend and baring her butt as she posed in front of a mirror. The 21-year-old songstress and her rep have not confirmed that the photos are legit but a source told Hollywood Life that Lovato is "livid" someone exposed her private pictures.

Reportedly, someone was sending the pictures to different media outlets in hopes of making some cash from them. You can check out the pictures here.

According to Hollywood Life, Lovato is afraid more nude photos and maybe even a video might also be leaked.

"Demi has definitely come to the realization that more pics and even video might be released in the future," a source told Hollywood Life. "She thinks that it will be released around a time that she has something to sell like a song, book or something that goes with her career."

Despite being frustrated by the situation, the source said that the "Heart Attack" singer is determined to stay positive.

"It is a very frustrating situation and she is figuring out the best process to deal with it," the source said. "It is not consuming her day though. Thankfully, she is using some of the things she learned in rehab as a guide for how to handle things so far."

After the pictures leaked, Lovato posted a quote on her Twitter page in Spanish that read, "Soy fuerte. Soy luchadora. Asi que no me subestimen."

The tweet translates to, "I am strong. I am a fighter. Do not underestimate me."