Lollapalooza is one of the largest music festivals held around the world, and is also one of the longest-running music festivals within the US. Before being deemed as one the most iconic music festivals, and also being known by music fans from all over the world, Lollapalooza was founded in 1991, and started off as a touring event. Several years later, Lollapalooza transitioned itself from being a touring event to being permanently located in Chicago, Illinois. So how big is Lollapalooza anyways?