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Niall Horan and Hailee Steinfeld fuel dating rumours as they attend Backstreet Boys gig together

Hailee Steinfeld and Niall Horan’s latest outing together is feeding dating rumors… once again.

Last night (February 17), The Sun Online reported the “Capital Letters” singer and “Slow Hands” crooner were in attendance at the Backstreet Boys’ “Larger Than Life” tour stop in Las Vegas.

Like the true detectives they are, followers quickly recognized the conspicuous couple in no time and were fast to record the 24-year-old One Direction member and the 21-year-old Pitch Perfect actress keeping close to one another throughout the event.

Needless to say, the footage, which has since made its rounds on Twitter, insinuates the potential songbirds might also be lovebirds. A dancing Steinfeld and beaming Horan appeared to be enjoying each other’s company, as both stars were chanting along to the lyrics of the boy band’s party hits like “I Want It That Way.”

A source confirms to E! News that after the concert the duo hit up at XS Nightclub where they sat together at a stage table with a few friends, sipping on Absolut Elyx cocktails and taking in a DJ set by Diplo.

Fans first began speculating a romance between the performers when the duo was seen at London’s West End production of Hamilton shortly after the new year. The gossip continued as their rumored love affair came to the forefront again when the “On the Loose” warbler attended a birthday party for the “Most Girls” musician’s older brother, Griffin, just a week later.