Home News Guillaume Oded July 30th, 2026 - 10:02 PMMartin Garrix has joined forces with U2 for the new collaborative single “Fireflies,” released via Darkroom Records. Garrix premiered “Fireflies” during his headlining set at Tomorrowland last Friday, where The Edge made a surprise appearance to perform the song live. “Fireflies” follows recent collaborations from Garrix, including “Repeat It” with Ed Sheeran and “Bizarre” with Madonna. Last year, mxdwn reported that Martin Garrix performed at Tomorrowland after Metallica helped the festival rebuild its main stage following a fire. Garrix returned to the Belgian festival this year to debut “Fireflies” alongside The Edge, giving the new collaboration its first live performance.