Katie Couric reveals bulimia battle: Most surprising celeb confession?

Katie Couric always seems so confident and put together, but when she was in college, she suffered from bulimia, she admitted on her new talk show "Katie" on Monday.

"I wrestled with bulimia all through college and for two years after that," the perky 55-year-old journalist said while interviewing an expert on eating disorders. "I know this rigidity, this feeling that if you eat one thing that's wrong, you're full of self-loathing and then you punish yourself. Whether it's one cookie or a stick of gum that isn't sugarless ... sometimes [I would] beat myself up for that," she added.

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The segment featured 20-year-old "X Factor" judge Demi Lovato, who has also spoken publicly about her struggles with eating disorders and self-harm. But Katie? We didn't see it coming.

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From Katie's bulimia to Arnold Schwarzenegger's secret love child, let us know: Who made the most surprising celebrity confession?