Metallica had this to say about their headlining slot, "It's been nearly 20 years since we've been lucky enough to take the stage at Lollapalooza, so we are over the top that we've been asked to play this year at the now annual extravaganza held at Grant Park in Chicago. We'll be hitting the stage on Saturday, August 1st."

This year's lineup also includes Sam Smith, Charli XCX, Bassnectar, The Weeknd, Of Monsters and Men, Kid Cudi, Alabama Shakes, Alt-J, Tyler the Creator, Philip Selway, Death From Above 1979, Hot Chip, TV on the Radio, Brand New, Gary Clark Jr., Gogol Bordello, and more. - See the lineups for each day here.

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