Surrounded by football fans, cameras and confetti, Taylor Swift shared an on-field kiss with boyfriend Travis Kelce after the American football star earned a second straight Super Bowl win.

Millions of Americans had tuned in for the championship match – which also threw the spotlight on Swift’s closely-watched romance with Kelce, who is tight-end for the Kansas City Chiefs.

Their embrace – following the Chiefs’ nail-biter victory over the San Francisco 49ers – was a cinematic finish to a football season in which Swift and her new boyfriend have often taken centre stage.

The singer, currently in the midst of her billion-dollar Eras tour, has been a regular at Kelce’s games since her first NFL appearance in September.

Together, the two megastars have become a cultural juggernaut, inspiring memes, breathless tabloid coverage and themed merchandise.

Match report: Kansas City Chiefs defend NFL title after beating San Francisco 49ers in overtime
Usher joined by Alicia Keys and will.i.am for half-time show.

To some, their relationship apparently seemed too good to be true, with right-wing critics spinning Swift and Kelce-themed conspiracy theories.

Some critics even claimed their relationship was part of a plot to rig the championship game in an effort to help US President Joe Biden, a Democrat, get elected.

On Sunday, Donald Trump seemed to weigh in, saying it would be “disloyal” of Swift to endorse Joe Biden, because Mr Trump had previously signed a law that made it easier for artists to collect royalties when their songs are streamed.

“Besides that, I like her boyfriend, Travis,” he added, in a post on his social media platform.

Some long-time football fans have griped at the sudden arrival of Swift, who has commanded the NFL conversation for months. Still, her presence has been a clear boon for the league.

Earlier on Sunday, Swift was pictured speaking to NFL commissioner Roger Goodell, who has called her a “dynamo”.

Everything she touches, there are people following,” he said at his annual news conference. “We count ourselves fortunate, and we welcome it.”

Indeed, Swift’s massive fandom has drawn an even bigger audience to the American sport.