These celebrities improved their health via diet and excercise.

Seth Rogen

Since first gracing the silver screen, funny guy Seth Rogen has slimmed down significantly by working out with trainer to the stars Harley Pasternak.

The 28-year-old ditched around 30 pounds in nine months.

 

Randy Jackson

In 2002, the American Idol judge weighed over 300 pounds. The music legend, 54, struggled to keep his diabetes under control and opted for gastric bypass surgery in 2003.
He lost 100 pounds and has kept it off by eating fewer processed foods, cutting back on fat and sugar, and spending more time walking on his treadmill and playing tennis.

 

 

Jennifer Hudson

The Grammy and Oscar winner’s dramatic weight loss was the makeover on everyone’s lips in 2010.
In August 2009, Hudson had to lose her baby weight before shooting her next movie, Winnie, in which she plays Nelson Mandela’s wife (due out this year). She worked out regularly with celeb trainer Harley Pasternak and cut back on calories with help from the Weight Watchers program.
Now the face of Weight Watchers, Hudson, 29, is a slender size 6, down from a 16.

 

Drew Carey

For funny guy Drew Carey, 52, the extra pounds were becoming a serious health issue.
After losing 80 since January 2010, Carey told People magazine he no longer needs medication for his type 2 diabetes.
To slim down, he stuck to a diet high in protein, fruits, and veggies, and a tough regimen of 45 minutes of cardio six times a week.