"A diss song at the Super Bowl is Nasty Nasty work," someone else noted. "Beef is alive? That boy got demolished," another poin

Post-Super Bowl, here's an explainer of everything you need to get caught up after Kendrick Lamar's reference-heavy performance.

In May 2015, Swift enlisted Kendrick Lamar to appear on the remix of “Bad Blood,” the 1989 clapback track that was reportedly aimed at Katy Perry. The collaboration wasn’t a surprise to those who had been paying attention. For months, the two had been very publicly sharing their admiration for one another.