Here’s what to know about Tight End University after Taylor Swift's surprise performance during a benefit concert at Nashville's Brooklyn Bowl.

So, Taylor Swift and Travis Kelce walk into a bar. No, that's not the setup to a joke: It's an introduction to what happened Tuesday night in Nashville, where Tay delivered a surprise acoustic performance of "Shake It Off" at a concert linked to her boyfriend's Tight End University camp.

After playing arenas filled with tens of thousands of people all over the world for two years on the Eras Tour, Taylor Swift made her return to the stage by surprising a bunch of fans at the sold-out Tight Ends and Friends benefit concert.