Kelly Osbourne lost a lot of weight when she did Dancing With The Stars. But, how has she maintained her weight loss success? Well, after leaving the show she decided to keep dancing as a form of exercise. Then, she added the Bar Method and Pilates to her workout routine. Also, she started eating a healthy and balanced diet which doesn't include random splurges of unhealthy food. Here's Kelly Osbourne looking great before and after her weight loss.