3. 50 Cent
One of the most well-known rappers of this generation, 50 Cents decided to drastically lose weight for a role in a movie called Things Fall Apart, where he played the cancer patient. Back in 2010, 50 Cent released photos of himself and it took the entire world by shock. He had gone from being a man of 214 pounds to looking like a sick man of 160 pounds. All these was done in just nine weeks time. Once the shooting was over, he did gain his weight back and became the 50 Cent we all know and love.