Randy Jackson
The former American Idol judge underwent gastric bypass surgery in 2003.
Randy Jackson
As a result, Jackson lost over 100 pounds!
Nicole "Snooki" Polizzi
The reality star was quite the party girl during her 'Jersey Shore' days.
Nicole "Snooki" Polizzi
Check her out now that she has left the Shore!
Drew Carey
The comedian and game-show host had some severe health issues in 2001.
Drew Carey
Through diet and exercise Carey lost significant weight and is much healthier now.
Ruben Studdard
The former American Idol winner was never a small man.
Ruben Studdard
But since his debut has made an effort to lose the pounds.
Jerry Ferrara
Turtle from HBO's 'Entourage' was constantly being teased about his weight.
Jerry Ferrara
Starting in 2010, Ferrara worked to lose 60 lbs.
Al Roker
Chances are you've seen Al on 'Today' forecasting the weather.
Al Roker
Al underwent gastric bypass and as a result lost over 100 pounds.
Mo'Nique
The comedienne, actress, and actor has never shied away from her weight.
Mo'Nique
But she is looking leaner and healthier now-a-days.
Seth Rogen
Funny man Seth Rogen has often made fun of himself and his weight.
Seth Rogen
But lately, the comedian is looking rather svelte.
Nicole Richie
The former reality star raised concerns for her health when she lost a considerable amount of weight.
Nicole Richie
Rumors of an eating disorder were refuted and it turns out she is hypoglycemic and is now at a healthy weight and looks amazing.
Perez HIlton
The blogger and tv personality has undergone a considerable physical change.
Perez HIlton
Looking lean and mean lately, someone has definitely been putting time in at the gym.
Star Jones
The former host of 'The View' and contestant of 'The Celebrity Apprentice' went from this...
Star Jones
To this with a dramatic weight loss!
Kelly Osbourne
Kelly grew up on camera on her family's reality show.
Kelly Osbourne
Now working red carpets, she is looking stunning!
John Goodman
John has been working in Hollywood for years and struggled with weight gains.
John Goodman
He seems to have it under control now, looking quite dapper here.
Jonah Hill
Jonah Hill became a star with his role in 'Superbad'.
Jonah Hill
When it came to playing a police officer in '21 Jump Street' Hill had to get in shape and is looking quite fit.
Graham Elliot
Appearing on 'Iron Chef' and 'Top Chef' Elliot certainly knows his way around a kitchen.
Graham Elliot
He is clearly paying closer attention to what he is eating lately. Looking good, Graham.
Jennifer Hudson
The Grammy-Award-winner and former American Idol contestant is a vocal powerhouse.
Jennifer Hudson
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These celebs have hit the gym and gotten their diets in order and the results are amazing!
