Los Angeles: Singer Demi Lovato says the period when she suffered from eating disorder made her very manipulative. The 19-year-old former Disney star, who entered rehab in late 2010 to seek help for her problems, spent two years prior to her hospitalization doing whatever she could to avoid people finding out there was anything wrong, reported a magazine.

"I was a very manipulative person when it came to my eating disorder. You name it, I did it. I would lie about already eating. I would lie about having to go to the bathroom. I would go to any lengths to make sure I was sick," she said.

The former 'Sonny with a Chance' star said that her problems with food go back to a very young age.

"I began compulsive eating at the age of eight. Then, when I started being bullied at 12, I stopped eating. I went from overeating to under eating to throwing up," she added.

At the height of her success, the 'Camp Rock' star admits she could barely bring herself to look at pictures of herself in magazines because she was so uncomfortable with her appearance.

"It never really went away. I'd try, but the impulses would come back. You feel like you are on a downward spiral, but you have to fight through it," she said.