A star-studded viral marketing stunt? This is “How It’s Done.” KPop Demon Hunters stars Rei Ami and Kevin Woo surprised fans with a concert from atop a double-decker bus in New York City on Saturday, August 23.

The Netflix production KPop Demon Hunters is being showcased in theaters for a limited weekend, featuring sing-along sessions. In a delightful surprise for fans in New York City, the voice actors of the beloved characters took to a double-decker bus to perform several of the songs.

A sing-along version of "KPop Demon Hunters" is officially coming to Netflix on Monday, Aug. 25. The release of the "KPop Demon Hunters Sing-Along" on the streamer follows the Netflix-hosted "KPop Demon Hunters A Sing-Along Event,