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Jennifer Hudson

The singer/actress and Weight Watchers spokeswoman shrank from a size 16 to a size 4. The star says that while she’s still adjusting to her new body, she looks and feels 10 years younger. Photo by: Jon Kopaloff/FilmMagic, Johnny Nunez/WireImage

Hollywood's incredible shape-shifting celebrities

By Sarah Bernard, Host of The Thread: Whether it’s for a role or simply to get healthy, some our favorite celebrities have recently made dramatic physical transformations. Thanks to the endless photo calls that are part of their jobs, we can take a look back at the “before” shots that make the “after” images all the more impressive. Here’s a gallery of incredible metamorphoses that include both down- and upsizing.