The annual Lollapalooza music festival celebrated 28 years this year as the party wrapped up Sunday evening. The four day festival held in Grant Park offered more than 170 artists at eight different stages. The Revivalists took over the T-Mobile stage Sunday afternoon. Lead singer for the band, David Shaw points his microphone towards a fan in the crowd. Lollapalooza 2020 will be held July 30 through August 2.