Arcade Fire had just released their fifth studio album, Everything Now, on July 28, but instead of ending with one of their new tracks or a fan favorite, the band opted for a John Lennon cover. "There's so much poison in the air," the band told the crowd before their final song. "We need love and peace," making the Lennon lyrics like, "Love is the answer and you know that for sure" ring louder and more true than ever, setting a positive final message for those who opted to see the band as their final act of the 2017 fest.