How Chicago’s Uniting Voices Choir Helped Close Out Djo’s Lollapalooza Set

How Chicago’s Uniting Voices Choir Helped Close Out Djo’s Lollapalooza Set

CHICAGO — Two days before they helped close one of the most memorable sets at this year’s Lollapalooza, the 40 teen singers in Uniting Voices Chicago’s top ensemble performed their newest arrangement to an audience of one: Joe Keery. The former DePaul University student, Djo frontman and “Stranger Things” actor had come to a small rehearsal room on the North Side for a first listen to the choir’s reimagined take of the band’s song, “Back On You.…