Watch Demi Lovato in Her Candid ’20/20′ Interview (VIDEO)

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Earlier this week, Celebuzz showed you a preview of Demi Lovato’s first interview since her abrupt exit from the Jonas Brothers tour that led to her checking into rehab for several months.

On Friday night, the full interview aired on 20/20, giving the world — and especially all of Demi’s “Lovatics” — a glimpse into what really happened back in November, and what she’s been going through over recent months. Watch the video above.

In the interview, Lovato explains that she did indeed attack dancer Alex Welch, and she says she feels “horrible” for the incident.

She also goes into detail about how constant bullying about her weight led to an eating disorder.

The Disney star admitted that she developed an eating disorder early on, and has been having issues with food ever since. “I was compulsively overeating when I was eight years old. … So, I guess, for the past 10 years I’ve had a really unhealthy relationship with food.” While her food issues began at age eight, Demi says it wasn’t until age 11 that she began to cut herself. She explained her reasoning for the cutting, telling Robin:

”It was a way of expressing my own shame, of myself, on my own body. I was matching the inside to the outside. And there were some times where my emotions were just so built up, I didn’t know what to do. The only way that I could get instant gratification was through an immediate release on myself.”

Demi broke down while on a concert tour in November with the Jonas Brothers for the Disney Channel musical, Camp Rock 2. At one point on the international leg of the tour Demi lashed out at one of her back-up dancers.  Commenting on the incident, Demi said she takes “100 percent, full responsibility. … I feel horrible. [She] was my friend.” As for that troubling time, she added:

“I was performing concerts on an empty stomach. … I was losing my voice from purging. I was self-medicating. I was not taking medication for depression, and I literally was so emotionally whacked out that I took it out on someone that meant a lot to me.”

Now, Demi seems to be in a much better place and hopes her story can help others just like her. “The real reason why I’m sitting down with you is to open up the eyes of so many young girls, that it doesn’t have to be this way.”

Tags: Demi Lovato