Taylor Swift gave security at Arrowhead Stadium a crash course in good manners on Sunday, telling one guard to speak a little nicer to the paparazzi.
The pop superstar arrived at the stadium in Kansas City to watch her boyfriend, Travis Kelce, and his K.C. Chiefs battle the Denver Broncos on the field — but Taylor had her own itty-bitty skirmish behind the scenes before the kickoff.
Check out the video ... Taylor was being chauffeured in a golf cart through the arena with her mom and dad -- Andrea and Scott.