On May 17, 2015, Taylor Swift debuted her “Bad Blood” video at the Billboard Music Awards.

The premiere was highly anticipated and featured a slew of notable actors and performers. It also doubled as a Kendrick Lamar-assisted remix, with the Compton MC dropping two previously unreleased verses.

Taylor’s original song “Bad Blood” is widely recognized as a public note about her falling out with Katy Perry. In this context, Kendrick’s verses could be a take on his thoughts concerning his own haters. A popular Kendrick fan theory concerns his alleged beef with Drake. However, this rumour was laid to rest in an interview with Complex in 2014.

“Bad Blood” was directed by LA-based Joseph Kahn, whose portfolio includes music videos with Britney Spears, Gwen Stefani, Muse, and Eminem. Kahn also directed Taylor’s “Blank Space” video. He shot to internet viral fame with his dark “deboot” of the popular children’s series Power Rangers in March 2015.