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While guys like John Candy, John Belushi and Chris Farley all proved to be the exception to the rule in the world of comedy, there’s still a high standard for celebrities to be wafer thin. In fact, actresses and artists like Melissa McCarthy, Adele, Queen Latifah and even Katie Perry are all criticized for being a little too curvy and voluptuous. And, if any celeb packs on a few pounds, you can bet they’re sure to hear about from the media! So which celebrities have struggled the most with their weight over the years and which ones have seen complete transformations? From lifestyle changes like dieting and exercise to going under the knife, we uncovered many shocking celebrity weight losses that are sure to drop your jaw! 1. Alec Baldwin Business Insider 53-year-old Alec Baldwin shed 30 pounds in four months and he couldn’t have done it in a healthier way. Diagnosed as pre-diabetic, he gave up sugar, which he said over twitter is, “truly a battle.” He also does Pilates and Spinning and would like to add more yoga to his workout regime. We’re not sure if it’s because he wants to get centered and increase flexibility or if it’s because he’s married to a yoga instructor! 2. Mariah Carey Pinterest After putting on 30 pounds during her pregnancy with twins Moroccan and Monroe, Mariah Carey felt pressure to lose the weight fast. But instead of turning to extreme measures she started following the Jenny system. And it’s not all about looking skinny for the stunning singer. Working with Jenny and the American Heart Association, Carey wants to educate Americans about the risk of heart disease and diabetes caused by unhealthy eating and exercise habits. 3. Jonah Hill Starcrush Rumor has it that Moneyball costar Brad Pitt is responsible for Jonah Hill’s dramatic weight loss but we’re happy to hear it was a nutritionist’s advice that helped him shed the pounds. With a little guidance in terms or what to eat and what not to eat, Hill has been able to maintain his slim physique. A love for fresh and healthy Japanese cuisine, particularly sushi, has helped the actor stay on track. 4. Ricki Lake Top News We all watched Ricki Lake transform on Dancing With the Stars where she reportedly lost 20 pounds but, what has she done to continue losing weight and to keep it off? She uses the food delivery service Freshology, which provides 1,400 calories a day. Healthy food helps but Lake credits her maintained weight loss to regular exercise—not calorie restriction. What singer is next on our list? Click "Next" to find out. 6. Drew Barrymore Daily Star Having spent nearly her entire life in the spotlight, Drew Barrymore has shown that a healthy lifestyle is the secret to long-lasting weight loss success. Through frequent portion-controlled meals, yoga and running, Drew Barrymore has transformed herself from flab to fab. 7. Ricky Gervais Lookdamngood Ricky Gervais lost only about 20 pounds, but it's impossible not to notice how his body has transformed from flab to fab. How'd he do it? By getting active. All he had to do was get off the couch and get running—just a little bit every day. 8. Sara Rue Leap Fitness Rules of Engagement star Sara Rue confesses she's always had weight issues, but when she got engaged she made the decision to change. Her healthy weight loss revelation? "100 percent—you can control what you put in your body." She joined Jenny Craig and loves the simplicity, "they send you the meals, you add in your veggies, your fruit and you're done." Click "Next" to find out who the next star(let) is on our list. 9. Kirstie Alley Lookdamngood Kirstie Alley has experienced extreme weight loss and gain and loss and gain… but we hope she will soon be a weight loss success story for good. She attributes her most recent weight gain to a severe candy and soda habit. But by owning up to her bad habits and starting the Kirstie Alley weight loss program, Organic Liason, she's already shed 50 pounds. 10. Jason Alexander NY Daily News Jason Alexander didn't set his sights on extreme weight loss—and that may be his secret to success. The pleasantly plump actor turned to Jenny Craig to lose just 30 pounds. By slashing his daily caloric intake from 4,500 to 1,500 and adding regular workouts, he was able to drop the weight in 6 months. Don't have 6 months? 11. Drew Carey Shape Fed up with being fat, The Price is Right host Drew Carey shed an astonishing 80 pounds. Despite the extreme weight loss he did it the old-fashioned-way—through diet and exercise. Drew Carey does at least 45 minutes of cardio a day and cut carbohydrates from his diet. 12. Christina Aguilera US Magazine The pop diva showed off her noticeably slimmer figure and estimated 20-pound weight loss at the season-four premiere screening of The Voice in March 2013. Aguilera whipped her body back into prime form by working out with fitness guru Tee Sorge and practicing yoga. "It's more of a mind-body thing for her," a source revealed to Us. "She believes in exercise that she enjoys, doing strength work as opposed to intense cardio." She's been working with Sorge ever since. What method actor is next on our list? Click "Next" to find out. 13. Christian Bale Lookdamngood Considered a sex symbol for his scorching intensity, Bale bulked up his six-foot frame to about 190 pounds of muscle in 2002 for Reign of Fire only to drop 70 pounds for his role in the 2004 psychological thriller The Machinist. Putting the muscle back on for Batman Begins the following year, Bale’s weight has fluctuated over the last decade with his most recent change occurring in 2013 when he turned to cheeseburgers to gain nearly 50 pounds for American Hustle. Having already lost the weight, stay tuned because it won’t be long before Bale prepares his body for his next big role! 14. Oprah Winfrey Lookdamngood Not shy about sharing her weight issues as well as her love of carbs (especially bread), Winfrey was at her largest in the early 1990s when she weighed 237 pounds. She made headlines in the early 2000s when she dropped to 160 pounds but the diet was fleeting. Now 62 years old and admitting that she let her weight creep back up to 200+ pounds, Winfrey happily revealed in April 2016 that she has lost nearly 30 pounds on Weight Watchers while enjoying her favorite foods “every, single day!” 15. John Goodman Lookdamngood One of the most respected actors in the industry, Goodman decided he was tired of the “large guy” stereotype and adopted a healthier lifestyle by ditching what he refers to as “crapola.” No stranger to dieting after losing 60-70 pounds in his early career, Goodman has taken his recent weight loss more seriously (and slower) and is now 100 pounds slimmer than before. When asked about his new look and health, Goodman joked, “Just wait another six months and I’ll be back to normal.” Luckily, Goodman’s new and healthier version of normal has stuck. 16. Tom Arnold Lookdamngood Extremely vocal about his former drug and alcohol addiction, Arnold also claims that he was addicted to food before 2014 when he reappeared in front of cameras 100 pounds lighter. Inspired to get his health on track after the birth of his son Jax, the 57-year-old became a fanatic about tracking calories, cutting carbs and portion control. Heading to the gym for cardio at least six times a week, Arnold continues the routine today and credits much of his success to his wife who helps by preparing meals and encouraging him along the way. What famous child of a celebrity is next on our list? Click "Next" to find out. 17. Chaz Bono Lookdamngood Bono dropped 85 pounds in 2011 and showcased his new body on Extra where he said the secrets to maintaining good health was a diet made primarily of meat, fruit, nuts and vegetables. Giving up stress eating and junk food altogether, Bono said, “My birthday is the one day of the year when I’ll do cake.” Eventually opting for plastic surgery to remove the excess skin around his torso and under his arms as a result of the weight loss, the 47-year-old is finally happy with who he is. 18. Queen Latifah Lookdamngood Known to embrace her curvy figure and empower women of all shapes and sizes, Latifah decided to set a better example for her female fans by shedding some weight. Turning to Jenny Craig for help (and later becoming a spokesperson), Latifah hired a personal trainer and soon turned heads on the red carpet looking noticeably different after losing 30 pounds. Though she admits her struggle with keeping the weight off over the years, Latifah says that she loves her curves even more today. 19. Randy Jackson Lookdamngood Accustomed to life on the road and eating poorly, Jackson decided to change his life completely in 2003 after weighing in at a whopping 350 pounds. Opting for gastric bypass surgery two years after being diagnosed with diabetes, the 59-year-old Jackson lost a large amount of weight in a short amount of time when he returned to American Idol weighing 220 pounds. Leaving the show in 2014, Jackson’s weight has continued to fluctuate but he hasn’t seen 350 on the scale in quite some time. 20. Chris Pratt Lookdamngood Trying out for the part of Scott Hatteberg in the 2011 film Moneyball but told he was too heavy after weighing in at 280 pounds, Pratt was determined to win the role and headed straight for the gym. A self-proclaimed former couch potato, Pratt dropped 30 pounds and sent the casting director a photo and was immediately given the part—but he wasn’t done there. Building muscle and putting on 20 pounds of healthy weight, Pratt has finally completed his physical transformation into the Hollywood hunk we know and love today. Source: (Shape, Lookdamngood)