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.