Ronnie Brower weighed 675 pounds (290kg) two years ago and doctors told him that he probably wasn't going to live past the age of 35.
That's when one of his old teachers, Joe Bufano step in to help Ronnie make a change.
Ronnie credits Joe and Taylor Swift's music for helping him get in shape.
He says he started doing simple exercises around the house to Taylor Swift songs until he was healthy enough to get out and go to the gym.
Take a look at his amazing transformation in the gallery below.