VIDEO : Ariana Grande, Childish Gambino Announced As Lollapalooza Headliners

Ariana Grande, Childish Gambino, Twenty One Pilots and The Strokes will headline this summer's Lollapalooza music festival. The entire festival lineup was announced for the four-day event with more than 170 acts playing eight stages in Chicago's Grant Park. Other performers include Tame Impala, Flume, J Balvin, The Chainsmokers, Janelle Monae, and Lil Wayne. Recent Album of the Year Grammy winner Kacey Musgraves will also make an appearance. The festival, which has been held in Chicago since 2005, runs August 1-4.