Zach Bryan brought his Quittin Time Tour to Detroit’s Ford Field on Thursday night and used the opportunity to sing with the artist he calls one of “the best songwriters of all time,” Jason Isbell.

Isbell and the 400 Unit are playing a string of dates on Bryan’s stadium tour, and near the end of the opening set, Isbell welcomed Bryan onstage to duet on “King of Oklahoma,” off Isbell’s 2023 Weathervanes album.

“Thanks for letting me ruin your song Mr. Isbell. I respect you and care for your music more than life itself. It was a privilege and an honor to meet a hero,” Bryan self-deprecatingly wrote on Twitter following the performance. “Can’t wait to hear this without my voice on it at the next one, we love ya!”

Bryan plays the Buckeye Country Superfest this weekend in Columbus, Ohio, before linking back up with Isbell in Foxborough, Massachusetts, next week for another Quittin’ Time Tour stop at Gillette Stadium on June 26. Isbell and the 400 Unit also open Bryan’s New Orleans, Houston, Tampa, and Arlington, Texas, dates later this summer.

Bryan also announced the release date of his next album: The Great American Bar Scene arrives on Independence Day, July 4. Ahead of the release, 23 select bars in the U.S. — including Barnacle Bill’s in Rumson, New Jersey; Fox & Locke in Franklin, Tennessee; and McGlinchey’s in Philadelphia — will be debuting the record.

“My intent with all this is to give everyone an early glimpse of this album, but more importantly this is in the spirit of bringing people together for a memorable moment,” he said in a statement. “As much as I’d kill to play all these timeless bars, it won’t be possible. I will be visiting a few off the list to have a drink with ya’ll.”