Demi, 21, has never been shy about discussing details about her past drug and alcohol addictions. But in her most revealing interview yet, she says that she was so dependent on cocaine that she had to smuggle it onto airplanes just to make it through a flight.

Demi Lovato‘s cocaine addiction is what originally sent her to rehab in 2010, but she also told Access Hollywood that she knew she hit rock bottom when she filled a Sprite bottle with vodka to drink at 9 a.m in 2011 when she was staying at a sober living house. She also admitted that her eating disorders began at the age of 8, thinking that she was “going to die” when she “compulsively” overate and vomited afterward.

Demi Lovato: ‘I Couldn’t Go Half An Hour Without Cocaine’

Demi revealed that she couldn’t go 30 minutes to an hour without cocaine, and even brought it on airplanes with her.

“I would smuggle it and just wait until everyone in first class would go to sleep, and I would do it right there,” the former Disney star revealed on Dec. 9. ”I’d sneak to the bathroom, and I’d do it. That’s how difficult it got and that was even with somebody [with me].”

Amidst her battle with cocaine, she was also addicted to alcohol. The X Factor judge had a wake-up call at 19-years old after she drank vodka in the morning out of a Sprite bottle.

“I was going to the airport, and I had a Sprite bottle just filled with vodka,” Demi said. “It was just nine in the morning, and I was throwing up in the car and this was just to get on a plane to go back to LA to the sober living house that I was staying at. When I hit that moment I was like, ‘It’s no longer fun when you’re doing it alone.’”

Demi Lovato: Became Bulimic & Anorexic At 8-Years-Old

The Neon Lights singer also revealed that her bulimic and anorexic eating disorders began at 8-years-old.

“I started overeating, compulsively overeating. I would bake cookies and then eat the whole pan. I went from doing that to being unhappy with my body. I went to just completely starving myself and that turned into throwing up and starving myself. It got really difficult [and] I would throw up, and it would just be blood and it was something that I realized if I don’t stop this, I am going to die,” she said.

We’re so happy that Demi got the help that she needed. After leaving her treatment facility in January 2011, she’s now a true role model for others struggling with addiction.

Are YOU shocked by Demi’s cocaine confession, HollywoodLifers? Let us know!

– Ivy Jacobson

More Demi Lovato News:

1. Demi Lovato: How Selena Gomez Helped Save Her From Addiction
2. Demi Lovato: Selena Gomez & Nick Jonas Helped Me In Rehab
3. Demi Lovato Tweets Surprising Response To Joe Jonas’ Drug Diss