Three-day music festival features performances by headliners the Killers, X Ambassadors, and Florence + the Machine, plus Metric, Arkells, the War on Drugs, St. Vincent, Father John Misty, Blue Rodeo, Mother Mother, Chromeo, Bahamas, Stereophonics, Rodrigo Y Gabriela, Cold War Kids, Buffy Sainte-Marie, Matt Andersen, Matt Mays, Current Swell, Dear Rouge, Said the Whale, Yukon Blonde, the Zolas, Hey Ocean!, Delhi 2 Dublin, Barney Bentall, Crystal Shawanda, Belle Game, the Matinee, and more.