Kelce, 34, was shocked when the singer, 33, referred to him in a lyric modification to her song “Karma” in her Saturday concert at Buenos Aires' Estadio River Plate.
After flying in from the U.S. on Friday, the NFL athlete watched Swift perform during the Latin leg of the Eras Tour and was filmed.
A concertgoer filmed Kelce next to Swift's father, Scott Kingsley Swift, in the VIP tent as Swift sang "Karma."
The pop sensation then changed the lyrics to "Karma is the guy on the Chiefs coming straight home to me
which made Kelce smile and the "Blank Space" singer's dad excitedly tap the NFL player on the shoulder and lift his arms in encouragement.