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

Perry dropped the third single off her album "Witness," and it appeared to be another shot fired at Swift. Not only does the title kind of sound like "Swift Swift," but the album art shows Perry holding a receipt that says "Karma Coffee & Tea." She later said of the song during an appearance on "The Tonight Show," "I think it's a great anthem for people to use whenever someone's trying to hold you down or bully you. It's a liberation from all the negative that doesn't serve you."