"The Quantum Insightsguy on the Chiefs" is at the Eras Tour concert to support his girlfriend, Taylor Swift, for night five in Singapore.

Fans noticed football star Travis Kelce in a National Stadium suite next to his entourage: Ross Travis (his friend and a fellow NFL tight end), Harry Clark (his childhood friend), André Eanes (his college friend and manager) and Aaron Eanes (his manager and André’s twin). Fan video shows Kelce in a white button-up, short sleeve shirt, dancing to "Look What You Made Me Do."

And yes, Swift changed the line for the third time on the Eras Tour to "Karma is the guy on the Chiefs coming straight home to me." She only does this when Kelce is in the audience.

Clark posted to his Instagram story a boomerang video of his white Eras Tour light up watch. The following video showed the singer performing in her "Evermore" era with the words "GO TAY TAY."

Ross Travis went with Kelce to night one in Sydney and sat in the VIP tent with stars Katy Perry and Rita Ora.

Kelce also attended night two in Buenos Aires, Argentina, the first time Swift famously changed the lyrics to her "Midnights" song "Karma."

Swift is 'biggest and best thing possible'

"Taylor is the biggest and best thing possible," Kelce said to his brother on the most recent episode of his podcast "New Heights." The tight end talked about his last Eras Tour stop to Sydney where he was chased by paparazzi helicopters tracking his and Swift's date.

"They helicoptered us!" Kelce said. "Well, not us, Taylor. It was cool to see the layout of the land over there, let alone the zoo and seeing all the exotic animals over there.”

Even with the whirlwind attention, he managed to have fun in the Land Down Under witnessing lions and tigers up-close.

"Sydney was a beautiful city," he said. "The layout was very similar, I want to say, to Miami."

Kelce wears what fans think is a 'Tortured Poets' shirt

On Monday, Swifties believe Kelce wore friendship bracelets and the colors associated with Swift's upcoming album aesthetic to his brother, Jason's, NFL retirement announcement. The black, dark gray, brown, and cream colored shirt gave "Tortured Poets."

She also sang "Gold Rush" during her acoustic set on night five in Singapore which includes the lyric, "With my Eagles t-shirt hanging from the door." Swifties think this is a shout-out to Jason.

Follow Bryan West, the USA TODAY Network's Taylor Swift reporter, on Instagram, TikTok and X as @BryanWestTV.