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Muse

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

Yahoo Music Staff

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

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