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.

Kansas City Chiefs star Travis Kelce helped provide a special treat for his fellow tight ends at "Tight End University" when his pop-star girlfriend Taylor Swift put on a surprise performance.

This year’s edition of TEU included a surprise appearance from Kelce’s girlfriend Taylor Swift, who took the stage to perform during the “Tight Ends and Friends” portion of the weekend. The gathered crowd, understandably, went nuts. On this week’s episode of the New Heights podcast, Kelce explained how the surprise cameo came together.