But drastic changes that these stars usually undergo are anything from extreme weight loss programs, men who buffed up for movie roles, former childhood stars who are now showing off a sexier side, and so much more. In the last couple of years, these shocking transformation looks started happening more and more, to the point where people are already bracing themselves to see the shocking new look of the next celebrity. And while shocking is often used in negative terms, the word can also be applied in a positive manner for some of these celebs in this list, who famously lost weight after being told by doctors they would die if they didn't start following a healthy diet. It goes without saying that the majority of celebs in this list have/or had transformed for the worst, but of course, you get to be the judge of that. See the list of the 13 celebs with the most shocking transformation looks below.