Demi Lovato revealed new details about her time in rehab and her road to recovery in a recent interview. Demi Lovato thought her career would be over after rehab, but attributes her recovery to her supportive fans. Will she give more details about her drug use and alcohol abuse in her upcoming book?

In a new interview in the Nov. 15 print issue of Entertainment Weekly, Demi Lovato, 21, revealed the extent of her drug and alcohol struggles, and how she thought her career was over after going into rehab, Us Weekly reports.

"When I was in treatment, I honestly thought my career was over," she said. "But when I came out of treatment, I had more supportive fans than ever."

In October 2010, Demi Lovato withdrew from the "Jonas Brothers Live in Concert" tour to enter a rehab treatment facility for "physical and emotional issues," Us Weekly reports. Demi left rehab in January 2011 and has since tried to be a role model for her fans.

Demi Lovato is releasing a book full of daily affirmations on Nov. 19, called "Staying Strong: 365 Days a Year." She has also already signed on to write a book, a tell-all memoir of her struggles with alcohol and drugs while also juggling being a young Disney star, Us Weekly reports.

What will she reveal in her new book?

"I'm battling with internal thoughts on how honest I should be," the "X Factor" judge said. "Yes, I've been very honest, but if people really knew how dark and deep my struggles got -- not just with my eating disorder but with drugs and alcohol -- they'd be really shocked. But I'll most likely end up saying everything. Maybe it'll help other people in the industry who are headed down the wrong path."

When Demi went into rehab, she was in the middle of collaborating with The Jonas Brothers both on tour and in the films "Camp Rock" and "Camp Rock 2: The Final Jam," as well as starring in the Disney series "Sonny With a Chance."