Taylor Swift and Justin Bieber haven't always had a tumultuous relationship. The "Baby" singer actually opened for Swift back in the day and the two kept it relatively cordial. However, drama involving Kanye West and Scooter Braun, who is Bieber's manager, and a rocky relationship between Bieber and Swift's best friend Selena Gomez turned things sour very quickly.
Even still, there hasn't been an extremely dramatic, or more importantly public, display of their dislike for one another. But it looks like that might be changing soon.