Star Jones probably thought she was one of those fat people who had "pretty face but just needs to lose some weight" or that she had a "skinny person inside just waiting to come out..."
She was wrong. Eeeeeeeeeeeeeeeeew. She needs to put the skinny person back inside. But she can't now because she had radical gastric bypass surgery, and if she eats more than a thimble full, she'll blow her ass out.