Joanna Rohrback, author of Prancercise, created and uploaded three videos to YouTube to showcase her new exercise. One of those videos (https://www.youtube.com/watch?v=o-50GjySwew) has had over 12.5 million views. As singer and songwriter John Mayer was working on his song Paper Doll, he was watching one of her videos and noticed that Joanna’s prancing went well […]