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Olivia Rodrigo and Noah Kahan have had a mutual admiration society going for months now, and it all culminated on April 5, onstage at New York’s Madison Square Garden, during Olivia’s GUTS world tour.

Olivia was playing the first of four nights at the legendary venue when, about three-quarters of the way into the show, she said she was really excited about performing the next song. She then brought Noah onstage and they sang a duet of his hit “Stick Season,” as the crowd screamed along with every word.

Noah, who’s currently on tour in Canada, made a special trip to New York to sing with Olivia; he’s scheduled to perform in Toronto on April 6.

You may recall that Olivia performed a version of “Stick Season” for BBC Radio 1’s Live Lounge, and then Noah returned the favor by performing a version of Olivia’s song “Lacy.” A split single of both versions is coming out on vinyl for Record Store Day on April 20.

After their duet, Olivia wrote on Instagram that Noah is “the greatest of allllll time !!!!!!”  Noah replied in the comments, “Better than the original!! Olivia you’re a star best show I’ve ever seen.”

He also wrote on X, formerly Twitter, “Olivia rodrigo is such a special talent and person and I just can’t thank her and her band and team for inviting me to sing tonight. You deserve it all .”

On stage later in the show, Olivia leaned into the New York City aesthetic by rocking a tank top that read “Carrie Bradshaw AF.”

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