A Timeline of Taylor Swift and Katy Perry's Feud, From Beginning to End

Just ahead of the 2016 Grammys, Perry decided to throw a preparty that was meant only for creators. "You have to be a creator," she told The New York Times. "It's artists, producers and songwriters." Perry also confirmed that Swift was invited and that it was just up to her schedule whether she could make it. Swift did not attend.