Pop star Demi Lovato has struggled with the eating disorder bulimia for years. This week, she took to social media to share a side-by-side comparison from when she was younger to now. The "then" photo shows a younger Lovato, presumably pre-treatment, versus a mirror-selfie from August of this year. Last year, Lovato told American Way magazine that she began bingeing and purging when she was only 9 years old. In 2010, Lovato left her tour for bulimia and substance abuse treatment.