Demi Lovato Rehab, Demi Lovato has cut herself and has made herself throw up to avoid putting on weight since rehab, she admits in the touching MTV documentary “Stay Strong.” Video of her admission is below.

The star, who is famous for her body image problems but also for the transparency with which she battled them, admits she's relapsed since coming out of treatment in January 2011.

As she puts it in the 60-minute documentary, shot right after she came out of rehab, she will be an addict for life, every day is a new battle she must win.

Fans (or lovatics, as they're called) must know that Demi received treatment for eating disorders and self-confidence issues, which often made her cut herself.

Part of the reason she had such severe issues was becoming famous at such an early age. It was everything she expected it to be – and more.

“I loved it but it was kinda when I got a little crazy and maybe, possibly, out of control. It literally ended up driving me insane. I was not eating and purging and self-harming,” Demi recalls.

“I cannot tell you that I have not thrown up since treatment. I cannot tell you that I have not cut myself since treatment. I’m not perfect. It’s a daily battle,” she says in the documentary, which has already aired on MTV.

However, she now knows that such behavior is destructive, she's broken the cycle. When she relapses, she turns to friends and family for help.

She also knows that millions of other girls are looking up to her. In fact, Demi explains, the only reason she's going public with such a personal, painful experience is because she's trying to help them.

“I felt really vulnerable, and I still kind of do tonight. I wouldn’t change it. I know that some girl probably needed to hear this story tonight,” she says of her decision to make the documentary.

She's ok now and she hopes other girls who might see her documentary might realize they're not alone – and talk to someone about their problems so they can get the treatment they need so badly.