Ed Sheeran performed in Chicago this weekend on his Mathematics Tour, where he made a surprise appearance at The Wiener’s Circle.

“This place is legendary [in] Chicago for serving hot dogs and insulting their customers. I loved it,” the singer wrote in an Instagram caption.

In a video shared on Instagram, the Grammy-winning singer-songwriter steps up to the counter and serves Chicago-style hot dogs, all while immersed in playful insults hurled by the restaurant’s foul-mouthed staff.

The restaurant referred to Sheeran as its “favorite bloke,” poking fun at his hot dog-serving skills, stating, “Our newest trainee [Ed Sheeran] has a lot to learn, he’s way too proper and friendly.”

Later that day, the singer broke ticket sales records at Soldier Field with 73,000 attendees, “this is the largest concert that’s ever been here,” Soldier Field tweeted.