Like all new mothers, after Jessica Simpson
gave birth to her 9 lb., 13 oz. daughter, Maxwell
Drew, she was ready to go back to her pre-baby body - and fast.
"I think anybody who's gone through a pregnancy, after they have the baby, it's like, 'I need to do something about this,' " she tells PEOPLE, in its latest cover story. "For me, I really want to do something that is a lifestyle, because in ...