Demi Lovato on 'Katie' - Sneak Peek!

Demi Lovato snaps a pic with Katie Couric during her appearance on Katie in New York City.

The 20-year-old actress sat down with the former news anchor to talk about her time in rehab and the issues she faced.

“Treatment was so difficult at first, I remember walking around saying ‘I’m in prison!’” Demi recalled. “They needed to have those strict rules in order for me to understand how sick I was. I wasn’t allowed to use the bathroom by myself. We had specific phone times. There are tons of things you weren’t allowed to have, you weren’t allowed to have certain hair products or whatever that you could injure yourself with or possibly drink and you were just stripped of a lot of things.”

She continued, “I also had somebody watching over me every single time I ate. And if I didn’t finish what was on my plate, and often times I would cry because I physically couldn’t stomach it and if that happened I would have to have little consequences, nothing horrible just not being able to go to the cafeteria to eat.

Demi‘s episode will air Monday, September 24th. Check your local listings for time and channel!