One can never be too rich or too thin. Just ask the models and fashionistas who turned out to fete the new Mercedes Maybach at Gustavino's in New York. Victoria's Secret supermodel Heidi Klum, 28, eyed the sleek new car while dining on a salad and giant shrimp. "It's amazing and very expensive," she told PEOPLE. "Maybe someone will buy it for me?" To keep her own figure slim enough for lingerie shoots, the model and former vegeterian eats moderately. "I don't even look at desserts," she said. "I don't really like sweets. I'm very lucky. I think the trick is that you have to be tough with yourself and say no to the potato chips. It's just a matter of being really controlled and saying no to those things." Klum also employs a personal trainer to put her through an hour-long workout, three times a week." It's basically one hour of everything," she explained to PEOPLE. "It's all different things packed in one hour without any breaks." Model and lingerie designer Kimora Lee Simmons (wife of hip-hop magnate Russell Simmons), who is pregnant with a child due in the fall, told PEOPLE that her favorite meals include Cobb salad and crab dip. The 5'11" Simmons never exercises. "Walking is working out to me," she explained. "Walking up and down the stairs and regular mobility is working out to me." Ah, the wonder of genetics.