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

Drake and Kendrick worked together on two songs that dropped in October 2012, “Poetic Justice,” from Lamar’s second album, “Good Kid, MAAD City,” and A$AP Rocky’s “F–kin’ Problems,” later included on Rocky’s debut album, “Long. Live. ASAP,” the following year. The artists haven’t collaborated on a song since.