Carrie Underwood may have relied on her natural singing talent to win American Idol, but the blonde bombshell has to work hard in order to maintain her figure.

"I'm slightly obsessive-compulsive about what I eat, more than I should be. I write down everything I eat," Underwood says in the latest issue of Glamour. "I started doing it last year. And in the last year is when I've gotten more healthy and lost weight."

She's also gained a pair of men in that time: Tony Romo, with whom Underwood had a brief affair; and now Gossip Girl star, Chace Crawford. It doesn't sound like either ate any meat while on dates with the singer:

"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 said.

Meanwhile, Carrie will join Keith Urban on a 24-city tour that kicks off in January. She'll be packing her talent - and a whole lot of luggage!

"I have a giant makeup case, more makeup than any girl should have in her lifetime."

Amy Winehouse might wanna borrow some of that.