Taylor Swift surprised guests in Nashville by closing out a benefit concert for Tight End University with Kane Brown.

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.

Taylor Swift surprised fans at a benefit concert at Tight End University by performing "Shake It Off" with Kane Brown.