Butch Walker’s tour in support of his latest album Afraid of Ghosts is underway and last night in Philadelphia the singer-songwriter got some help from The Gaslight Anthem’s Brian Fallon, who was in attendance. Fallon shared the below image of his experience side-stage at the show.

Fallon joined Walker on “21+” from the new record early on in the show. The studio version of the song, recorded at Ryan Adams’ PAX AM in Los Angeles, features a guitar solo from Johnny Depp. Additional personnel on the album include Bob Mould, Adams and members of The Shining.

Additional highlights in the set included a callback to Walker’s time in LA rock outfit Southgang with “Love Ain’t Enough” as well as a cover of Bette Midler’s “The Rose” before the finale of “Father’s Day.”