Lollapalooza 2019: J Balvin, Ariana Grande and more stars will be sharing the spotlight

What is Lollapalooza? It's a four-day music extravaganza held annually held in Chicago, Illinois. For Lollapalooza 2019 in the Windy City, J Balvin will make history as the first Latin music headliner to take the stage as he joins the likes of Ariana Grande at the music fest.