Lollapalooza is an American music festival featuring alternative rock, hip hop, and punk rock bands, dance and comedy performances, and craft booths. It has also provided a platform for non-profit and political groups. Lollapalooza has featured a diverse range of bands and has helped expose and popularize alternative groups such as Nine Inch Nails, The Smashing Pumpkins, and Hole.

Conceived and created in 1991 by Jane's Addiction singer Perry Farrell as a farewell tour for his band, Lollapalooza ran annually until 1997, and was revived in 2003. From its inception through 1997, and its revival in 2003, the festival toured North America. In 2004, the festival organizers decided to expand the dates to two days per city, however poor ticket sales forced the 2004 tour to be cancelled.   In 2005, Farrell and the William Morris Agency partnered up with Austin, Texas-based company Capital Sports Entertainment and retooled it into its current format as a weekend destination festival in Grant Park, Chicago, Illinois.