Nicole “Snooki” Polizzi – Diet & Exercise / 42 pounds
Another celebrity on our list battling mental disorders is Nicole “Snooki” Polizzi, who openly stated that she was anorexic as a teenager. She proved to be a big party-animal, and despite being rather short, she started showing bigger and bigger numbers. She decided to go on a crash diet and after being a mom for the first time in 2012, she dropped 42 pounds. Despite the fact that she got pregnant again in 2014, she didn’t stop caring about her nutrition, and she has maintained her slim shape.