Some stars, like Oprah Winfrey, Kirstie Alley, Jessica Simpson, and Christina Aguilera, are as famous for their ever-changing bodies and weight ups and downs as for their talent
After making it big on American Idol in 2002, Clarkson started to gradually put on weight. In recent years, her size has varied from curvy to fit; last summer, she shed 30 pounds through diet and exercise. "My happy weight changes," she said in 2009. "Sometimes I eat more; sometimes I play more. I'll be different sizes all the time. When people talk about my weight, I'm like, 'You seem to have a problem with it; I don't.'"