Ke$ha has checked into a 30-day rehab clinic for an unspecified eating disorder, reports TMZ. The 26-year-old singer didn't divulge much in a statement: "I'm a crusader for being yourself and loving yourself, but I've found it hard to practice. 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." The vegetarian is in the same Illinois clinic (Timberline Knolls) that treated Disney star Demi Lovato for her eating disorder in 2010, notes Radar. (More eating disorder stories.)