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
Once super slim, Carey gained weight as she got older and then got pregnant with twins Moroccan and Monroe. "I gained an enormous amount of weight," she told Us Weekly of her pregnancy. "I felt trapped in my body because I couldn't move." That changed thanks to a diet and exercise plan from Jenny Craig, which helped her drop 30 pounds. "I'm proud of how hard I worked to get my body back," she said. "I had to do this for me."