Kesha entered rehab to treat an eating disorder. Ke$ha, the 26-year-old singer best known for her outrageous music videos, checked into Timberline Knolls a residential treatment center near Chicago, which was the same rehab center Demi Lovato went to for her addiction and eating disorder issues. The treatment center is about 40 minutes away from Chicago, IL. Ke$ha will remain there for at least 30 days.

If Ke$ha is getting heavy, it isn't showing in her latest music videos. The singer doesn't cover much up and still looks trim.

Ke$ha told People magazine "I'll be unavailable for the next 30 days, seeking treatment for my eating disorder...to learn to love myself again. Exactly as I am. I'm a crusader for being yourself and loving yourself but I've found it hard to practice."

According to media reports, Kesha, who is a vegetarian, is blaming her producer, the songwriter Dr. Luke, for her condition. Ke$ha claims that he made fun of her weight. Dr. Luke signed Kesha when she was 18 years old.

Sources told TMZ.com that Dr. Luke told Ke$ha that she looked like a "f***ing refrigerator."

The insiders say that Dr. Luke commented on the "Timber" singer's weight after she put on a few pounds after her "Get Sleazy" tour ended. The sources say that Dr. Luke called Ke$ha fat and went to her management to get her to do something about it.

Ke$ha recently made her directorial debut for the music video for the "Dirty Love" track,from her 2012  Warrior  album "Dirty Love."  Ke$ha peels in the video and dances in a strip club setting in her underwear.

KeSha looks thin in the video for "Timber," KeSha's collaboration with Pitbull. Dancing in nothing but her underwear and bra, Ke$ha's body doesn't show the added pounds.