(Photo: CBS) Debbie Mehlman and Sharon Poset were brought up in different faiths and different traditions. But their habits are incredibly similar. When they get excited, they cross their eyes. "Our dads would have said the same," says Sharon. "Don't roll your eyes at me, young lady." Segal noticed a lot of similarities when the twins danced to mambo music in an experiment tape. "We wanna see how their bodies move," says Segal. "And here, they can't see each other, but they're moving the same way." But there are differences, too. Debbie says she likes to work out -- something her sister, Sharon, doesn't do. "I don't look that bad," she says.