There are reports that Ke$ha isn't just in rehab for an eating disorder—she's got an alcohol problem, too.

According to RadarOnline, she worried her camp with her alcohol intake.

A source said: "In recent months, those closest to her had become increasingly worried about her drinking. It's been the stuff of legend in the past and she's never hidden the fact that she loves to drink."

"Now, though, part of her bid to get healthy is to get completely healthy — and that will involve looking at her abuse of alcohol. Some of her advisors had raised this in the past. There's no doubt that Ke$ha has her demons and the chief one is an eating disorder. It's the primary reason she checked into Timberline Knolls."