CHICAGO — The Weeknd, Bruno Mars, Jack White, Arctic Monkeys, Travis Scott, the National, Vampire Weekend and Odesza will headline Lollapalooza. The lineup, announced Wednesday for the festival Aug. 2-5 in Grant Park, brings a strong hip-hop presence that includes Logic, Post Malone, Lil Uzi Vert, Tyler the Creator, Lizzo and Brockhampton. Also on the bill: St.