15 Celebrities Who’ve Experienced Dramatic Weight Loss.

Celebrities are just like us in terms of battling with their weight as the demands of Hollywood to stay thin and fit often go hand-in-hand with the longevity of one's career. Click through to learn more about which celebrities have struggled the most with their weight and which ones have seen complete transformations.

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1. Star Jones

Star Jones, the original host of talk show The View, was tired of being called morbidly obese, so at 300 pounds, she had weight loss surgery, which helped her lose 140 pounds. Now she eats healthy and works out every day to help her stay trim and sexy.

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2. Rachel Frederickson

Rachel Frederickson, The Biggest Loser winner, revealed on the season 15 finale of NBC's weight loss competition reality show that she had dropped 155 pounds, "I did it healthfully and naturally, and I'm really proud of the work I did."

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3. Jennifer Hudson

Jennifer Hudson, the winner of both Academy Award and Grammy Award, dropped more than 80 pounds after she joined Weight Watchers, and combined her efforts with diet and exercise.

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4. Rebel Wilson

Rebel Wilson, better known as Fat Amy in Pitch Perfect, used to take advantages of her curves to get roles. But lately, she decided that health is more important, so she has started on a strict diet plan and exercises daily to lose weight.

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5. Janet Jackson

Janet Jackson, the sister of Michael Jackson and a pop icon, re-emerged in 2007 looking much larger than ever before. Embarrassed by the photos, she quietly made a change in her eating habits and cut out all the junk food. Now the 51-year-old looks even sexier than before.

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6. Kim Kardashian

Kim kardashian weighed 200 pounds after giving birth to her second child. Determined to get her curves back, she worked out with a personal trainer nearly every day and followed a strict diet. Finally she got back down to a slender 130.

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7. Jonah Hill

Jonah Hill used to get cast as the big guy in all of his movies, and that annoyed him. So he turned to diet and exercise as a way to maintain a healthier weight. His efforts are definitely paying off, given how amazing he looks now.

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8. Susan Boyle

Susan has stopped eating sweeties and cakes since she was diagnosed with Type 2 diabetes. Also, she has been working out lately with some of the most successful personal trainers in hopes that she could be in better shape when she meets her true love. Her efforts finally paid off because she has lost a whopping two-stone in weight.

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9. Jordin Sparks

Jordin Sparks, the winner of American Idol in 2007, had always been known for being a plus sized girl. When she decided to get healthy, she devoted herself to the gym and a healthy diet, and she succeeded losing over 50 pounds.

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10. Kirstie Alley

Kirstie Alley, best known for her role as Rebecca Howe on the NBC sitcom Cheers, weighed 228 pounds at her heaviest. Embarrassed of her ever-fluctuating weight, she resorted to diet and one popular exercise program to shed the pounds.

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11. Randy Jackson

Randy Jackson, a former judge on American Idol, became seriously overweight when he had to travel a lot and didn't have time to eat healthily or work out. He then underwent gastric bypass surgery back in 2003 and lost 130 pounds.

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12. Paul Wall

Paul Wall was considered one of the cuter rappers due to his extra fluff baby face. However, not happy with being overweight, he turned to healthier eating and exercise, and lost 130 pounds.

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13. Graham Elliot

Graham Elliot, a celebrity chef, weighed in at a ridiculous 400 pounds at his heaviest. With the help of gastric bypass surgery and a strict diet, he managed to lose over 150 pounds.

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14. Ricki Lake

Ricki Lake, best known for her talk show, has had problems with her weight for years due to her extreme love for food. However, the 20 pounds she lost after joining Dancing With The Stars motivated her to hit the gym and eat properly. Now she looks amazingly gorgeous.

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15. Raven Symone

Raven Symone, who rose to fame as Olivia Kendall in The Cosby Show, got enough of public scrutiny, so she decided to ditch the extra baggage by eating less and more healthily. She succeeded in losing 170 pounds, and now looks better than ever.

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