Watch Former Laguna Beach star Kristin Cavallari flaunted her post workout bod on Instagram just seven months after giving birth to her second child Jaxson. With these photos, she's proving that working moms can balance motherhood and fitness at the same time. So how did she drop the 20 pounds after her pregnancy? She says that you have to workout and eat really well. But what is her biggest secret to losing the weight? Find out what she cut out of her diet to make her look so good here!.