The knockout performance in question happened at the Tight Ends and Friends concert at Music City's Brooklyn Bowl, with Swift getting the crowd hyped up as she took the stage in a black dress and matching heeled boots. As she strummed her guitar, Brown danced along on stage and added extra percussion by shaking a stick of bells.

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

Taylor Swift surprised guests at the Brooklyn Bowl in Nashville by closing out a benefit concert with Kane Brown.