"I wanted to let you know that I am back and home," says the Camp Rock 2 star, who checked into an unnamed facility in late November to deal with "emotional and physical issues."
(The young entertainer has previously battled eating disorders and self-mutilation.)
Thanking her fans for well-wishes, notes and gifts, Lovato says: "I wouldn't be here today if it wasn't for the support you guys have given me along the way...Your support is what got me through this."
Although Lovato doesn't get into specifics about her latest struggle, she reveals, "The journey that I've been on has been very difficult over the past few months. I was dealing with issues that I know not only girls just my age but of all ages are dealing with."