New York City Mayor Zohran Mamdani made an unexpected on-screen appearance during musician Djo's Forest Hills concert on July 17, delivering a brief message to performer Joe Keery. The mayor has developed a pattern of surprise guest appearances at various New York music venues, lending his presence to concerts by artists including MJ Lenderman, Lucy Dacus, and PinkPantheress.

The cameo substituted for the typical voicemail portion of Djo's song "Charlie's Garden," which ordinarily features audio from actor Charlie Heaton. Mamdani's message congratulated Keery on achieving a full house at the venue, though the exact content became largely inaudible amid the crowd's enthusiastic reaction.