Demi Lovato is set to reveal all in her upcoming documentary Simply Complicated.
The first trailer has been released, and it show's Demi opening up about her mental health and physical health during her teenage years.
She reveals that she was 'not easy to work with'.
Demi is now five and a half years sober, single after a long-term relationship and reflecting on her past.
The documentary is a YouTube exclusive, and debuts on October 17th.