"Demi Lovato: Stay Strong" is the preceding documentary to "Simply Complicated", within which Demi Lovato talks about her struggles with drug addiction, anorexia, self-harming and bulimia and staying strong.
In 2010 she put her entire music career on hold in order to seek treatment for her problems, which at the time were spiralling out of control. This 2012 documentary follows the popular American singer just after she left rehab and began putting her life back together.
One of the main reasons for Demi making a follow-up to this documentary was to make the admission that the initial treatment had not worked and that she was in fact still using cocaine while being interviewed in "Demi Lovato: Stay Strong".