Demi Lovato was relieved by bipolar disorder diagnosis

Singer DEMI LOVATO was "relieved" when she was diagnosed with bipolar disorder, because the clinical explanation for her behavior made her feel less "crazy".

The Skyscraper hitmaker pulled out of a world tour with the Jonas Brothers and checked in to a rehab clinic after allegedly punching a back-up dancer in 2010. She spent three months seeking professional help for a number of personal problems related to an eating disorder.

Doctors eventually got to the root of her struggles and declared Lovato manic-depressive, and the 19 year old confesses she was grateful to hear there was a medical reason for her derailment.

She tells Cosmopolitan magazine, "I felt relieved when I found out, like, 'I'm not completely crazy; there's a medical reason for all of it'."

And although Lovato, who recently signed on as a new judge on U.S. TV talent show The X Factor, has since been on a path towards recovery, she admits it's a constant battle to stay on track.

She adds, "It's a daily thing; you don't get time off from it. And if I feel myself slipping back into old patterns, I have to ask others for help, which is hard for me to learn, because I really like doing everything on my own."