(LOS ANGELES) -- Rosie O'Donnell is down nearly 50 pounds.
The comedian and TV personality flaunted her major weight loss in a before-and-after photo of herself posted on Twitter this past Thursday.
"Almost 50 lbs off -- I can see it now," the 52-year-old The View alum wrote.
O'Donnell reportedly underwent weight-loss surgery in July 2013, one year after a heart attack. Before the procedure, O'Donnell reportedly weighed 220 pounds.
But O'Donnell isn't the only one. Here are some other celebrities who lost some serious weight:
It took Al Roker months after he shed 100 pounds in 2002 to go public about his gastric bypass surgery. "In this country, if you have an alcohol problem or a drug problem, you can get treatment," the Today weatherman told USA Today in 2002. "If you have a weight problem, it's lack of willpower."
In 2012, 12 years after documenting her 150-pound weight loss following gastric-bypass surgery, singer Carnie Wilson went under the knife again. This time, she told People magazine, she opted for lap-band surgery. "It was the right decision for me and I'm doing really well so far," the Wilson Phillips singer told the magazine in 2012. "It's all about taking good care of myself." Wilson said that by 2010, she was struggling to keep the weight off, after having two children.
Beginning in 2003, Star Jones, another The View alum, dropped 160 pounds in three years. While the world speculated about how she did it, Jones was evasive, until finally, in 2007, she admitted in a first-person essay in Glamour magazine to undergoing gastric bypass surgery. "The complete truth is, I was scared of what people might think of me. I was afraid to be vulnerable, and ashamed at not being able to get myself under control without this procedure," Jones wrote.
MasterChef judge Graham Elliot has been up-front about his struggles with weight and the sleeve gastrectomy he underwent last July after nearly hitting 400 pounds. He told People magazine that the hour-long procedure, where nearly 80% of a patient's stomach is removed to create a small sleeve-shaped stomach the size of a banana, allows him to still taste and try ingredients -- a necessity for a chef. By the end of last year, Elliot had completed his first ever 5K run and had posted a before and after photo on Twitter. "Now weighing in at 268lbs, down from 396lbs. Thanks everyone for the continued support!" he wrote.
After being diagnosed with type 2 diabetes, American Idol judge and mentor Randy Jackson made the difficult decision to undergo gastric bypass surgery in 2003. "I was having serious issues with becoming a diabetic," Jackson told CBS' The Early Show in 2004 after losing over 100 pounds. "So thinking about how to do it, I tried all kinds of diets, everything under the sun. I was like: I really need to do something to nip this in the bud right now. It worked for me, but I hesitate to recommend it for people because it's like a personal life decision. It's a life choice because you change and alter your complete life when you do this."
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