For some celebs, Dancing With the Stars isn't just about competing, it's a lifestyle change. Kelly Osbourne, arguably the show's most well-known transformation, lost over 40 pounds during her time on DWTS. It wasn't easy either: Kelly dropped the weight through a combination of dance rehearsals, outside exercise, and a diet makeover. Two years later, the changes have stuck and Kelly is looking better than ever. And while Kelly might be the most famous DWTS alum to lose weight, she's certainly not alone. Keep reading to see which other starlets walked away from DWTS with an entirely new bod!