Four-day celebration of contemporary music, art, food, and dancing. Performers include Black Keys, Kendrick Lamar, J. Cole, Tiësto, Hozier, Kid Cudi, Missy Elliot, Weezer, Jane's Addiction, the String Cheese Incident (playing two nights), Bassnectar, Passion Pit, M.I.A., Billy Talent, Chromeo, Dada Life, Sam Roberts Band, the Decemberists, the War on Drugs, Edward Sharpe and the Magnetic Zeros, Portugal. The Man, PartyNextDoor, Chvrches, Chef Faker, RL Grime, Banks, De La Soul, STS9, Duke Dumont, Matt and Kim, Earl Sweatshirt, Flux Pavilion, Dan Mangan + Blacksmith, Father John Misty, Galactic featuring Macy Grey, Run the Jewels, Paul Okenfold, Courtney Barnett, Cut Copy, Bleachers, Ryn Weaver, Logic, Tobias Jesso Jr., Real Estate, Flatbush Zombies, Yung Lean, Givers, Moon Taxi, Ryan Hemsworth, July Talk, BadBadNotGood, Gay Nineties, Broken Social Scene, Alice Cooper, Ludacris, G-Eazy, Shakey Graves, Zhu, Tune-Yards, the Glorious Sons, Post Malone, Apollo, Basecamp, Allie X, Hey Marseilles, Jpnsgrls, Letts, Pomo, Lovecoast, Dakota Pearl, and Will Ross Band. Also includes comedy by Nick Offerman, Tim Heidecker, Neil Hamburger, Dino Archie, and Ivan Decker.