Demi Lovato is doing well three years after going to rehab for drug and alcohol addiction, she told E! Feb. 3.
Looking back, Lovato is grateful that rehab saved her life, and helped her realize she had to change if she wanted to live.
"I don't think anybody can save your life except for yourself," said Demi, 21. "That was a key element in realizing I had to change. I don't place any of the blame on anybody else except for myself for not being so honest."
Lovato, who was addicted to alcohol, cocaine and pot, also suffered from the eating disorders anorexia and bulimia. She confessed that she used to smuggle cocaine on airplanes to feed her dangerous addiction.
“I couldn’t go 30 minutes to an hour without cocaine and I would bring it on airplanes,” she said. "I would smuggle it 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. 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.”
While Demi is honest about her drug use, she said she doesn't remember smoking pot with singer Joe Jonas. In December 2013, Jonas said the first time he smoked pot was at age 17 with Lovato and Miley Cyrus.
"The first time I smoked weed was with Demi and Miley," said Joe. "I must have been 17 or 18. They kept saying, 'Try it! Try it!' so I gave it a shot, and it was all right. I don’t even smoke weed that often anymore."
But Lovato has no recollection of the incident. "I don't even remember [smoking pot with Joe] because clearly, I was chilling," she said. "I called him and I was like, ‘Relax. We're good.' We're always going to be friends."
Lovato, who goes to therapy and takes medication after being diagnosed with bipolar disorder, wants to be a role model for other young girls suffering from similar problems. She hopes they can learn from her setbacks and realize there's hope, no matter how bleak things may seem at times.
"[I want to be a] role model," she said. "I had a negative breakdown and it changed my life forever. If I hadn’t gone into treatment, I don't know if I'd be alive today."
Demi recounts her harrowing battles with drug addiction, anorexia and bulimia in her book, Staying Strong: 365 Days a Year.