Bonus TV star: Rob McElhenney
The show: It's Always Sunny in Philadelphia
Weight gained: 52lbs
After noting how much hotter sitcom stars get as their shows run on, Rob McElhenney decided to do the opposite by transforming into Fat Mac. For months, he ate 5,000 calories a day. Most of it was relatively healthy stuff like chicken, rice, veggies, and protein shakes, but he definitely mixed in Big Macs and donut trios to push him over the edge. Fat Mac was gone by the next season, but he will be forever remembered in the GIFs taken from this pageant dance.