“I am so happy to have you at the show tonight,” a letter seemingly written by Swift read. “I wanted to say thank you for always being so supportive, so loyal, and for having my back when a lot of people didn’t. I hope you have a blast tonight!! Love, Taylor.”

Before Kansas City defeated San Francisco 28-18 on Sunday, Barstool Sports founder Dave Portnoy, who attended Swift's show on Saturday night, revealed he received a handwritten letter from Kelce's girlfriend. Portnoy explained in a video posted on X that Swift's brother, Austin Swift, personally handed him the letter at the show.

Taylor Swift wasn't able to attend Sunday afternoon's Chiefs vs. 49ers game in San Francisco, as she had other responsibilities. Her Eras Tour was taking place in Miami, Florida. Swift, 34, had three shows at Hard Rock Stadium in South Florida over the weekend.