When so many people have trouble exercising or losing weight, it’s good to learn about those who somehow succeed in their quest for more muscles or less pounds. A recent story about celebrities who lost huge amounts suggests that if you are on camera, you are really motivated to do it…eventually. But catch the drastic weight losses of Christian Bale and 50 Cent below. What incredible discipline. Then there is Star Jones, who cheated a tad…to lose 150 pounds…

Jennifer Hudson went from a size 16 to a 6 as a Weight Watchers spokesperson.

Drew Carey lost a reported 80 pounds this year with a combination of no-carb diet and cardio workouts

50 Cent lost some 50 pounds in just nine weeks to play a cancer patient in 'Things Fall Apart.'

John Goodman, who once weighed 400 pounds, debuted a much slimmer look this year.

Christian Bale lost a staggering 63 pounds to play the lead role in 'The Machinist.'

Valerie Bertinelli lost 40 pounds as a Jenny Craig spokesperson. This year she ran a marathon.

Kelly Osbourne lost about 40 pounds on 'Dancing with the Stars' and has kept it off.

Star Jones rapidly lost 150 pounds in 2003, and it took her until 2007 to admit she had had gastric bypass surgery.

Sara Rue lost about 40 pounds on Jenny Craig.