Taylor Swift and Katy Perry: A timeline

Taylor Swift and Katy Perry: A timeline

Ever since Taylor Swift said her 1989 cut "Bad Blood" was about someone in the music industry and not an ex-boyfriend, rumors swirled that the pop star was referring to Katy Perry. But neither singer explicitly commented on the supposed feud until this year, when Perry went on The Late Show With James Corden and confirmed she did indeed have a rocky relationship with Swift.

"Honestly, it's really like she started it and it's time for her to finish it," Perry said of the fight, which began over backup dancers. She later claimed to have tried to talk to Swift, but to no avail. "It was a full shutdown and then she writes a song about me, and I'm like, 'Okay, cool, cool, cool, that's how you want to deal with it? Karma!'" Perry said, before admitting that she would quash the beef with Swift if the 1989singer reached out to talk.

It wasn't always like this. In fact, the two began exchanging friendly tweets in 2009, just five years before "Bad Blood" came out. Ahead of this year's MTV Video Music Awards, hosted by Perry and featuring the debut video for Swift's new tell-off track "Look What You Made Me Do," check out a timeline of Swift and Perry's falling out.