One of the most unexpected crossover moments in modern dance music history just happened on the Tomorrowland Mainstage. Martin Garrix premiered his brand-new single 'Fireflies' with rock legends U2 live during his closing headline set on Day 1 of Tomorrowland 2026 Weekend 1 in Boom.
The Dutchman held the track back until the very end of his Friday night Mainstage performance, dropping it as the emotional closer of a set that had already teased brand-new collaborations, including his fresh Madonna cut ‘Bizarre’. ‘Fireflies’ arrives as one of Garrix’s most ambitious pop-rock crossovers yet, uniting his signature melodic production with the unmistakable sound of Bono and U2.
Garrix has spent the last few years steadily broadening the scope of the artists he collaborates with, from Ed Sheeran and Dua Lipa to Bebe Rexha, Alesso and now Madonna. The U2 pairing is arguably the most iconic to date, tapping into a rock lineage that stretches back four decades. Check out the Martin Garrix & U2 collab below:
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