Demi Lovato Talks Bullying, Body Image, and Cutting in Upcoming Katie Couric Interview [VIDEO]

It's no secret that "X-Factor" judge Demi Lovato is an avid supporter of campaigns focused on promoting anti-bullying and healthy body image amongst teens, specifically young girls. And in an upcoming interview with Katie Couric on her new daytime talk show, Lovato discusses personal issues dealing with bullying and insecure body image which she experienced during a very troubled youth. Lovato admits to realizing that she had personal body image issues as early as three-years-old, and that she almost wishes she could have been physically rather than verbally abused in school because of all the sadness and hurt that came of the mean name-calling.

Click here for a sneak peak of Couric's interview with Lovato, where the pop star talks about how she remembers weight becoming an issue with her when she was still in diapers.

A few years ago, Lovato entered herself into treatment for "physical and emotional issues." Lovato later admitted that she was severely depressed and self-medicating in extremely harmful ways. Since her inpatient treatment, Lovato has been very open about sharing her struggles and battle with bipolar disorder (which she was diagnosed with while in treatment). She is now a spokeswoman for Seventeen Magazine's "Love is Louder than the Pressure to Be Perfect" campaign in an attempt to help other young women facing such life pressures and struggles. She was also just named an ambassador for the anti-bullying campaign called "Mean Stinks."

In another sneak peak clip, Lovato opens up about bullying and how it ruined her childhood. She was verbally harassed so much in school that she decided to be homeschooled instead

When Couric asks about Lovato's stay in rehab, the 20-year-old talks about how she initionally struggled before being able to turn her life around:

"Treatment was so difficult at first, I remember walking around saying "I'm in prison!" 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. 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."

For Couric's full interview with Lovato, be sure to tune into "Katie" on Monday, Sept. 24: