Weight loss stories are inspiring — especially when there's photographic proof. Even though a good majority of Hollywood stars are already in great shape, there were quite a few weight loss reveals in 2010. If you're looking for some motivation to lose a few pounds or add a little definition to your arms, keep reading! And don't forget to take a look at the picture to your left — since appearing on DWTS, Kelly Osbourne has dropped five dress sizes. Inspiring, right?