The pop star was spotted cuddling up to Hayne, who plays for the San Francisco 49ers, in the players' tunnel at the team's Levi Stadium in California on Monday (14Sep15) after their home win over the Minnesota Vikings, and the snap has since gone viral.

Reports suggest they are a new couple, although Hansen, 18, and Hayne, 27, have yet to comment on the speculation.

If the romance rumours are true, the pair is likely to have bonded over their similar South Pacific cultural backgrounds - Hansen's family is of Tongan descent, while Hayne's dad was a Fijian rugby player.