As the Chiefs began celebrating in a cigar-smoke-filled locker room, Mr. Kelce struggled to open a gold Ace of Spades bottle of champagne. Once the bottle’s cork finally popped off, he spewed the spraying drink onto his corralled teammates, many of whom were already wearing large goggles over their eyes. Mr. Mahomes, at his nearby locker, carried a replica World Wrestling Entertainment championship trophy over his shoulder.
Before he reached the locker room, Mr. Kelce received a hug from his mother and embraced Ms. Swift, who planted a kiss on her boyfriend.
The scene may have been enough to set off another round of right-wing conspiracy theories about Ms. Swift, with her legion of devoted fans, being a Pentagon mole sent to influence this year’s presidential election.
(Sean McManus, the longtime CBS Sports chairman, poked fun at this joke last week when he said the N.F.L. had alerted him that the game could go into two overtimes. “You pay $2.1 billion, you get double overtime,” he said.)
To anyone else, the embrace between Mr. Kelce and Ms. Swift looked like a tender, unrehearsed moment celebrating the culmination of a monthslong journey.
The Chiefs’ victory gives them three Super Bowl titles in the past five seasons and makes them the first team since the New England Patriots in 2004 to win back-to-back titles — perhaps the one thing that on Sunday night stuck to the script.
Emmanuel Morgan and Kevin Draper contributed reporting.