The "Tik Tok" singer released a statement Friday saying she's at Timberline Knolls, the same facility where fellow singer Demi Lovato received treatment, TMZ reported.
"I'm a crusader for being yourself and loving yourself but I've found it hard to practice," Ke$ha said. "I'll be unavailable for the next 30 days, seeking treatment for my eating disorder ... to learn to love myself again. Exactly as I am."
Ke$ha canceled a five-city tour with Pitbull in October with only two weeks notice, the Hollywood Reporter said.
2014: The Year in Music [PHOTOS]