From singing icons like Jennifer Hudson and Kelly Clarkson to comedians like Drew Carey and Melissa McCarthy and even reality stars like Snooki and Khloe Kardashian: everyone probably has a struggle with their weight at some point. However, some of these celebrities decided to make a change and they have the nearly unbelievable “before and afters” to prove it. This is 23 unbelievable celeb weight loss transformations!

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13 Kelly Osbourne
In an interview with US Weekly, Osbourne lamented the fact that during her whole career she’s taken more insults and flack for being fat than she ever did for being literally addicted to drugs. However, once she went to rehab and got her addiction under control, her next project for self improvement was to become healthier. She started working out and dieting correctly in order to achieve her goal weight — and appearing on Dancing With the Stars probably helped kickstart that weight loss journey too! Since beginning her fitness lifestyle Kelly Osbourne has shed more than 42 pounds!

12 Randy Jackson
Everyone remembers the mellowest American Idol judge, Randy Jackson for his unique style and honest critiques. We all remember that he was a bit husky, too. Since leaving American Idol however, he’s gone on to lose an incredible 100 pounds! After finding out he had been diagnosed with Type 2 Diabetes he elected to have gastric bypass surgery in order to lose weight. Even with the surgery, his weight loss and quest to become healthier was not easy.

11 Rosie O’Donnell
Rosie O’Donnell is a comedian who’s publicly caught flack for her weight, probably because she’s both a woman and a lesbian. However, in recent years she’s begun to shed much of her weight and reveal a slimmer figure. While she’s been gradually getting thinner she admitted that it wasn’t until recently that she began to see herself as a new person rather than the version of herself that weighed 50 more pounds.

10 Aretha Franklin
Singing sensation Aretha Franklin revealed to DWTS contestant Wendy Williams that she lost an astounding 85 pounds. What prompted her to go from flab to fab? Franklin didn’t cite her mysterious December 2010 health scare; instead, she attributed her success to pictures that made her realize that she was fatter than she needed to be. Franklin said that she has been working hard to cut out foods that hurt you more than help you.