Celebrities who have been to rehab

24 of 46: Demi Lovato' entered a rehabilitation center in October 2010 for help with emotional issues. She checked out of the facility in January 2011 and said in an online video message to fans in March 2011 that her ordeal was 'the darkest time of my life.'

The following April, she talked about her issues on the ABC show 'Good Morning America.' She said thatshe has, throughout her life, struggled with food addiction, cutting and depression. Around the same time, she also told Seventeen magazine, regarding her rehab stint, that she 'basically had a nervous breakdown.'

Weeks later, the Disney Channel confirmed Lovato would not return to her show 'Sonny With a Chance.' The actress, who had played main character Sonny Munroe since the show began in 2009, said at the time that she wanted to focus on her music and that she didn't think shooting the series would be "healthy" for her recovery.

In an interview with Seventeen magazine, published in its February 2012 issue, Demi Lovato revealed new details about her troubled past and addictions.

'I'm not going to lie. I was self-medicating,' she was quoted as saying. 'I was doing things like drinking and using [drugs], like a lot of teens do to numb their pain.'

Lovato did not elaborate more about which drugs or medications she abused. She says that now, 'I don't drink, I don't do drugs, I don't throw up after my meals, I don't starve myself. There's nothing that I do that I feel ashamed of. I think sober is sexy. It's cool. I think it's way cooler to be above the influence than under the influence.'

(Pictured: Demi Lovato appears in a video message post-rehab, posted on the website Cambio.com on March 7, 2011.) ( Photo / cambio.com)