Bruce Springsteen made a surprise appearance at Zach Bryan’s concert in Philadelphia on Wednesday (Aug. 7) after the previous night’s wild weather saw his Tuesday (Aug. 6) show delayed.

The “Pink Skies” singer had quite the surprise in store for fans who attended his The Quittin’ Time Tour concert at Philadelphia’s Lincoln Financial Field, bringing out guest performers Bruce Springsteen, The Lumineers, and Shane Gillis, who performed with Bryan throughout the show.

Springsteen, who recently collaborated with Bryan for “Sandpaper” on his latest album, The Great American Bar Scene, joined Bryan on stage to perform “Atlantic City”.

Fans were delighted over the surprise appearances, with one taking to Twitter to write, “Hearing that Bruce Springsteen, The Lumineers, and Shane Gillis got on stage for Zach Bryan’s finale tonight in Philly and lightning could have struck me down leaving in the parking lot and that would’ve been a-okay with me.”

Another added, “Witnessed Bruce Springsteen and Zach Bryan blow up the Chicken man in Philly tonight. Then we had an all night Revival with Zach, Bruce, and The Lumineers—it was Spotless.”

It’s not the only time The Boss has joined Bryan for a surprise performance. He also joined the rocker on stage at Brooklyn’s Barclays Center on March 27, where they performed two tracks, including the pair’s collaboration “Sandpaper”.

Following the album’s release on July 4, the country crooner thanked Springsteen for his feature.

“Thank you for the day @springsteen. thank you for your kind words. thank you for letting me take this picture,” Bryan captioned a photo of Springsteen on X (formerly Twitter). “thank you for making my whole life a dream of a younger me. a reason to believe.”

Fans of Springsteen’s “I’m on Fire” will instantly recognize the chugging beat on “Sandpaper,” which is identical to the feel of his 1984 hit.

Bryan has also previously covered Springsteen’s Born in the U.S.A. classic “I’m on Fire” on several occasions, live and in the studio.