Jessica Simpson revealed that she lost an incredible amount of weight after giving birth to her daughter Birdie. "6 months. 100 pounds down (Yes, I tipped the scales at 240," she wrote "My first trip away from #BirdieMae and emotional for many reasons, but so proud to feel like myself again. Even when it felt impossible, I chose to work harder." But how did the fashion designer get into such amazing shape? The answer is: a lot of hard work with celeb trainer Harley Pasternak.