Chiefs tight end Blake Bell and wife Lyndsay also sported matching looks in another photo that Brittany shared, indicating that many of the players and their dates wore coordinated outfits.

An onlooker told PEOPLE that Swift’s holiday song “Christmas Tree Farm” played at the party — which took place in a semiprivate back room of the venue — and confirmed that the singer was in attendance at the celebration with her beau Kelce, 34.

“Everyone looked happy and festive” and there was “great energy” at the party, the onlooker saidseries of photos on Facebook where a customer claimed that Swift was at the bar on Friday night at the same time as she was.

“Hung out with Taylor Swift here last night and by hanging out I mean she was there and so were we,” the post’s caption said.“You might not care about records but you know who does, a 92 percent-er by the name of Taylor Swift. That’s right. She liked an Instagram announcement from the Chiefs about you breaking this record