Over the last year or so Carrie Underwood has lost a significant amount of weight. She credits this change to keeping a detailed log of her food intake on a daily basis.

During an interview with Glamour Magazine, Carrie said that the log along with cardio and no meat helps her remain healthy.

“I’m slightly obsessive-compulsive about what I eat, more than I should be. I write down everything I eat,” the American Idol, 24, champ dishes in Glamour magazine’s January issue. “I started doing it last year. And in the last year is when I’ve gotten more healthy and lost weight.”

What does she eat? Well, no meat. She’s been a vegetarian since age 13. (Listen up, Chace Crawford: “I don’t think I could kiss someone after they ate a hamburger ’cause they would probably taste like it, and that would gross me out,” she tells Glamour.)

Underwood also says she she enjoys cardio and “that big exercise ball.”

[Source]