During an interview with Access Hollywood, the X Factor coach revealed that she hit rock bottom at 19 — after she had checked into and completed a stint at an Illinois rehab facility in 2010 for "emotional and physical issues."
"Something I’ve never talked about before, but with my drug use I could hide it to where I would sneak drugs. I couldn’t go without 30 minutes to an hour without cocaine and I would bring it on airplanes,” Lovato, 21, conceded.
"I would smuggle it basically and just wait until everyone in first class would go to sleep and I would do it right there. 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."
Lovato says the disease of addiction made her a manipulative and sneaky person.
"I’m very, very good at manipulating people and that was something that I did in my disease, I would manipulate everyone around me," she said.
"There were times I would just continue to lie, so that everything looked OK on the outside."
And it wasn't just cocaine — Lovato also admits to abusing alcohol in the past.
"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," she told the outlet.
"When I hit that moment I was like, it’s no longer fun when you’re doing it alone.
"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 sh*t together."
Lovato's mother, Dianna, also weighed in during the interview admitting, "I suspected she was using drugs. It’s like any other parent, when you see things, when you see signs you don’t want to believe that’s what actually going on. So when they’re telling you that’s not what is going on… you want too badly to believe them and I think for a long time I was in denial."
Like Lovato, her mother Dianna also had an eating disorder and once the two sought help they grew closer as a family.
"I had a terrible eating disorder that I had for many, many years and I didn’t realize it and I had to face up to the fact that I was suffering as well. And a lot of what Demi went through with an eating disorder had to do with what she had seen growing up and I also had severe depression and I ended up asking for help actually they did an intervention with me and said, ‘Mom, you need to get help,’” Dianna admitted.
"The issue I had was definitely a mental health issue and I also had to get help for my struggles as well as she did and then once I did, we became closer as mother and daughter, and we also became well as a family."
"I’m so… proud of her it makes me so happy,” Lovato said. "I love her so much."