At only 21 years old, Demi Lovato has certainly cleaned up her act and come a long way from her darkest days.

The singer and X Factor judge recently opened up about her past drug use in a revealing new interview with Access Hollywood.

“Something I’ve never talked about before, but with my drug use I could hide it to where I would sneak drugs,” Demi admitted.

“I couldn’t go without 30 minutes to an hour without cocaine and I would bring it on airplanes. I would smuggle it basically and just wait until everyone in first class would go to sleep and I would do it right there.”

Demi added, “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], I had a sober companion, somebody who was watching me 24/7 and living with me [and] I was able to hide it from them as well.”

“I was going to the airport and I had a Sprite bottle just filled with vodka and 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…I had all the help in the world, but I didn’t want it.”

About hitting her rock bottom, Demi said “When I hit that moment I was like, it’s no longer fun when you’re doing it alone. I’ve really never talked about this stuff before… I don’t know if I should be sharing this.”

“I think at 19 years old, I had a moment where I was like, ‘Oh my God… that is alcoholic behavior. [It’s] no longer, I’m young and rebellious and out having fun, it was, wow, I’m one of those people…I gotta get my s*** together,’” she explained.