Demi Lovato has opened up about her emotional issues and also about being diagnosed with bipolar disorder.

The singer checked into rehab to deal with a number of issues, including bulimia and self harm.

In an interview with Seventeen magazine, she speaks candidly about all that she has been going through and speaks about the highs and lows of her treatment. "Since I went to treatment, there have been days when it's felt really easy, and I've felt great about where I am. But then I have moments when it's not. That's life. 

"You can't just take your mind and your body into the shop and get it fixed. It doesn't come out repaired. It's not like a car. It takes time - pace yourself. Every day is a new opportunity to change your life and be who you want to be."

Considering herself someone who can be a role model for others going through similar problems, she posted some advice on Twitter today.

In 2011 she appeared on The Ellen DeGeneres Show and spoke about bullying in her teen years and how much it affected her.

She also spoke on Good Morning America, during her stint last summer as a judge on X Factor, about being diagnosed with bipolar disorder. 

"I would stay up until 5am in the morning, just playing my guitar and my parents would wake up and be like, 'What are you doing?'. I couldn't stop going for days on end. I'd have crazy mood swings and finally when I got diagnosed it felt like cool, I'm not crazy. It's a disease."