Whether it's an updated 'do, a brand new wardrobe or a sleeker physique, celebs are always tweaking their looks and images. But some stars have made more drastic changes than others. Sneak a peek at which celebs' makeovers rank as the all-time best.
Back when he starred in "Superbad," you would have never imagined goofy, pudgy Seth playing a superhero. But when he scored the title role in "The Green Hornet," he kicked his diet and exercise regimen into high gear. By the time he started filming in fall 2009, he looked fitter than ever. But like the movie, Seth's skinny self tanked, and he gained back some of the weight.