Demi Lovato hates secrets as they make people 'sick'. The most important thing for her is honesty for having a healthy life.

'You've gotta be honest with people around you. And honest with yourself,' Demi told Teen Vogue. 'When you're having a rough day, be like, 'I don't want to talk about this, but I need to get it off my chest.' If you have a secret - secrets make you sick.'

Lovato learned the importance of honesty after her 2010’s rehab, and she realized who her real friends were. The US X Factor judge also talked about her body image and journey to self-acceptance in the publication.

'I don't have the body of a model or Barbie. My main thing about being in the spotlight with my fans is, I want to be real to them,' Demi said. 'I have my problem areas, but I'm happy in my skin right now. I'm not going to sacrifice my mental health to have the perfect body.'

The singer is appearing on the current season of Glee and she is proud of the role she portrays.

'I'm honoured to portray a character that's representing this chapter in our society,' said Demi. 'Being true to your sexuality and yourself is becoming the norm.'