1 / 31


Matt Bellamy of Muse performs onstage during the 2017 Firefly Music Festival on June 18, 2017 in Dover, Delaware. (Photo by Kevin Mazur/Getty Images for Firefly)

Gallery: On the Scene at Firefly 2017

Summer festival season is officially underway! See rock’s biggest stars burn bright at this year’s Firefly Festival in Dover, Delaware.