New Year, New You in 2014

Hollywood's Weight-Loss Winners!

Kirstie Alley, Kellie Pickler, Jonah Hill and more share the slim-down secrets that really worked

JONAH HILL

Lost 40 lbs.!
"I was living like a frat guy," the Moneyball star said of his former diet of beer and burgers. Deciding overnight to change his habits, the 27-year-old actor told Kidd Kraddick in the Morning he "went to a nutritionist and started running instead of emotional eating." Showing off his lean new physique, the 5 ft., 7 in. actor says he even makes time to squeeze in "100 push-ups a day."