Taylor Swift was in full celebration mode Sunday night, attending Kansas City Chiefs quarterback Patrick Mahomes’ 29th birthday party, fresh off cheering for her boyfriend, Travis Kelce, during the Chiefs’ victory over the Cincinnati Bengals.

The pop star, 34, joined the birthday festivities after the Chiefs’ thrilling 26-25 win at Arrowhead Stadium.

Photos shared on social media showed Swift enjoying the evening alongside Chiefs WAGs (Wives and Girlfriends) Shariah Gordon, fiancée of wide receiver Mecole Hardman, and Shona Weathersby, partner of defensive tackle Chris Jones.

In a series of photo booth snaps posted by Weathersby on her Instagram stories, the trio were all smiles, with Swift donning her signature red lipstick and red sunglasses. The photos also featured a “Happy Birthday Patrick” caption with the number 29 prominently displayed.

Mahomes’ wife, Brittany, 29, shared additional moments from the event, which took place two days before her husband’s actual birthday on September 17th. She posted an Instagram video walking into the venue decorated with a balloon arch displaying “29” in the center, excitedly announcing, “Celebrating our boy.” Brittany added personal touches to the party, including red cups and custom-made beer koozies featuring childhood photos of Mahomes.

Earlier in the day, Shona Weathersby shared more pictures from the Chiefs’ game, showing Swift and Gordon cheering from a suite at Arrowhead Stadium. “The scores never even – we’re always up one,” Weathersby captioned the snaps, which included one of Swift posing in front of a framed photo of Kelce. The pop star rocked a Chiefs jersey and thigh-high black leather boots while supporting the team.

Swift’s energy didn’t stop at the birthday party. During the game, she was caught on CBS’ broadcast reacting with excitement as Kelce, 34, nearly scored a touchdown after receiving a pass from Mahomes. Swift could be seen screaming “Oh my God, Travis!” as she grabbed those around her in the suite, only to realize Kelce fell just short of the end zone. The Chiefs quickly scored on the next play with a touchdown pass from Mahomes to offensive tackle Wanya Morris.

CBS play-by-play analyst Jim Nantz even referenced Swift’s recent success at the MTV Video Music Awards, saying, “Someone wanted to see six after she got seven Wednesday night at the VMAs,” after Swift was seen cheering the Chiefs’ late-game heroics.

Swift, who recently took home seven VMAs, tying Beyoncé for the most wins by a solo artist, continued to revel in the excitement as she celebrated alongside Chiefs fans after kicker Harrison Butker secured the game with a clutch field goal.

Between the Chiefs’ victory and Mahomes’ birthday bash, it was a memorable night for Kansas City and its famous new fan, Taylor Swift.