Weight loss is a touchy subject, and a grueling journey for many people. Even celebs aren’t immune to the cruel comments and health issues that can occur with excess weight gain. But we have rounded up ten inspiring stars who decided to take charge of their bodies and their health, and have lost amazing amounts of weight. Abby Lee Miller has done more in prison than catch up on her reading; she’s managed to lose 100 lbs! June Shannon, aka Mama June, is almost unrecognizable after her dramatic weight loss. Actor Jonah Hill has a history of playing the fat, funny friend in movies, but now he’ll have to just stick to being the funny one. Oprah Winfrey and Kirstie Alley have both struggled with their weight publically for a long time, but both appear to have it under control. If you’re a fan of lovable oaf, Chumlee from Pawn Stars, you’ll be relieved to know he’s taking his health seriously, and has lost over 100 lbs so far!