Taylor Swift and Brittany Mahomes Cheer on Travis Kelce and Patrick Mahomes at the Chiefs-Patriots Game

The singer and her new BFF supported their beaus at Sunday's matchup between the Kansas City Chiefs and the New England Patriots

Taylor Swift is continuing to prove herself as the ultimate supportive girlfriend to Travis Kelce.

The singer, 34, once again spent her Sunday cheering on the Chiefs with her new BFF Brittany Mahomes.

Swift and Mahomes, 28, sat together in a suite as they watched the Chiefs defeat the New England Patriots at Gillette Stadium in Foxborough, Massachusetts, on Sunday.

They were joined by the singer's dad, Scott Swift — who notably swapped out his Philadelphia Eagles green to support Kelce, 34 — as well as singer Alana Haim, fashion consultant Ashley Avignone and one of Swift's longtime back-up singers, Melanie Nyema, as they rooted for Kelce and the Chiefs.

Swift wore a knit Chiefs beanie — embroidered with her boyfriend's jersey number, 87 — with a gray team shirt, a skirt and her classic red lip, while Mahomes wore a black turtleneck and pants, and kept cozy in a fluffy white coat for much of the game.

Related: Taylor Swift Gifts Brittany Mahomes 1989 (Taylor's Version) and Limited Edition Cardigan

In a silly nod to a comment made by the Grammy winner in her Time Person of the Year cover story, Mahomes posted a photo of a cookie on her Instagram Story during the game, and no caption was needed as the cookie was decorated to say, "Dads, Brads and Chads."

Swift told the outlet that she goes to games solely "to support Travis" and has "no awareness" of how often she's shown on TV — nor does she care about "pissing off a few dads, Brads and Chads."

Since Swift started dating Kelce this summer, she and the wife of Chiefs quarterback Patrick Mahomes have spent many Sundays together cheering for the reigning Super Bowl champs — so much so that they've even got a special handshake.

When the Chiefs played the L.A. Chargers in October, the pair was spotted by fans doing a celebratory handshake after Kelce and Patrick worked together to score a touchdown.

They've also broadened their friendship beyond football stadiums. The two women have been spotted enjoying nights out in New York City together with Swift's friends, including Sophie Turner and Blake Lively, as well as nights out with other Chiefs wives.

A source told PEOPLE that "everyone had a blast" when Brittany joined Swift's pals in New York two months ago. "They all got along and were just laughing all night over drinks and delicious food," the source said.

Related: Meet the Wives and Girlfriends Cheering on the Kansas City Chiefs Alongside Taylor Swift

The "Cruel Summer" singer's appearance at Sunday's Chiefs game comes after she celebrated her birthday in New York City last week — though she was notably without Kelce by her side on the day.

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The tight end had mandatory practice on Wednesday, when Swift turned 34, and PEOPLE confirmed that he had to be in Kansas City. The couple had instead celebrated her birthday a few days early at a team party following the Chiefs loss against the Buffalo Bills last week.

They were spotted posing with partygoers and exchanging sweet kisses in group photos throughout the evening — and Kelce's barber later shared a photo that Swift took herself as the NFL star got a pre-game haircut.

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Read the original article on People.