Which Celeb Had The Biggest Weight Loss Transformation?

Losing weight while you're a celebrity can be tough, with the unforgiving glare of the media on you. But these celebs did it, and they are showing off their results in these stunning photos. But which celebrity had the most drastic transformation?

We all fell in love with funny lady Melissa McCarthy after her breakthrough roles in Bridesmaids and Tammy. She's always been positive about her body, but as she's gotten older she's shed some pounds in order to protect her health. Melissa credits her massive 75-pound weight loss with making a few simple changes for a healthier life - she now makes sure to go to bed early and get enough sleep! She also exercises regularly. Seems obvious, but these small changes really made a difference!

Gabourey Sidibe captured audiences' attention after her harrowing depiction of a 16-year-old pregnant teenager in Precious. In fact, her performance was so amazing that she was nominated for an Academy Award, and it was her first professional acting job ever! However, it wasn't smooth sailing from there - Gabourey was diagnosed with Type 2 Diabetes, which was caused by her weight. The event meant that she chose to have bariatric surgery. She's already dropped an amazing 50 pounds and looks great!

Mariah Carey defines the word Diva - known as much for her incredible vocal range as her outrageous demands for her dressing room, she's captivated America for nearly two decades. After marrying Nick Cannon, Mariah became pregnant with twins. Many mothers have a problem shedding the pregnancy weight, and Mariah was no exception to the common issue. Like Kirstie Alley previously on this list, Mariah decided to slim down by partnering up with Jenny Craig and now looks totally fit and healthy.

Kirstie Alley shot to Hollywood stardom after a breakthrough role in Star Trek 2: The Wrath Of Khan and a career-making part as Rebecca Howe on the iconic '80s TV show Cheers. However, as Kirstie put on the pounds, her acting opportunities started to dry up. She decided to get serious about slimming down and joined Jenny Craig. The actress dropped an astonishing 50 pounds and made good on her promise to fans to appear in a bikini on Oprah!