With her constant stream of top awards and her handsome new husband Mike Fisher, Carrie Underwood may appear to be on top of the world, but the country superstar reveals this wasn't always the case. In high school, says the Checotah, Okla., native, she suffered panic attacks, Underwood tells WebMD the Magazine. Particularly problematic was Christmas shopping, which, she says, "seemed to be my worst nightmare." The issue appeared to be the close proximity to others. "I'm a big personal space person. You know, if you go to the restroom, you use the stall that's not near anybody. Or if you're in the gym, you go to the treadmill where there's space in between you. And it seemed like in crowded situations like that, people would just completely violate your personal space," she says. "So, whenever I'd be in stores and there would be people touching me and kids running around, I couldn't take it and I'd have to leave." Though she has put the problem behind her, Underwood also says that having to adjust to dealing with crowds once she hit it big on American Idol in 2005 required some effort. Source: PEOPLE.com