On Friday night, instead of going to the show that I was supposed to go to, I stayed in bed and watched Taylor Swift’s first two GrammyPro talks and then proceeded to listen to 1989 for two hours. It was a worthwhile time investment. Today, the third and last part of Swift’s Listening Session series was posted, and it sees her breaking down “Clean” — her collaboration with Imogen Heap — and “Shake It Off,” which she worked on with Max Martin and Shellback. Demos from both sessions are shared. There’s even some rare video footage of the super-elusive Martin in the studio! Watch it over here.