Janet Jackson
Janet Jackson is responsible for changing the history of Super Bowl performances! She has had her fair share of struggles over the years and weight-gain was a side effect (something all too familiar to many of us), but she really embarked on a transformation, go girl! Many people might not even have even noticed her weight gain, seeing as Janet virtually faded into obscurity following her scandalous wardrobe malfunction at the hands of Justin Timberlake.
Chris Pratt
In the Marvel Cinematic Universe, Chris Pratt played a superhero. It is hard to believe that this is the same person who played the chubby and lovable Andy Dwyer on Parks and Recreation! At any rate, he has lost the extra weight and worked hard to get his current body and keep it in shape. We dig it a lot! Few Hollywood stars have had a more celebrated transformation than Pratt, who began hitting the gym like a madman to become the superhero that we know him as today.