by Claudine Zap Step aside, Homer Simpson . This real-life Donna Simpson, of New Jersey, could eat circles around you . The 42-year-old already weighs 600 pounds but has a big goal: To be the fattest woman in the world by almost doubling her weight in the next two years. That's a lot of donuts. With first lady Michelle Obama taking on the weighty topic of childhood obesity, it may come as a surprise that one woman would choose to be size very, very large.