In 2016, Lollapalooza will be celebrating its 25th anniversary, and the Chicago festival is marking the occasion by going even bigger with four days of music and more bands than ever before.

Lollapalooza will take place at Chicago's Grant Park from Thursday, July 28, and through Sunday, July 31, The Chicago Tribune reports. This will mark the first year that the annual music festival will be four days. Along with the extended dates, of course, ticket prices are also getting a bump for the new year. Four-day general admission passes will be $335 and one-day tickets will run $120.

Along with the increased ticket prices, there will be more bands on the bill. Lollapalooza 2016 is set to boast over 170 acts.

Though there is no indication that the four-day format will be permanent, the Lollapalooza extension is hardly the first change that the festival has faced in its 25 years. Lollapalooza got its start in 1991 as a touring festival, spread across the United States for one day only a la Warped Tour. However, after 2004 failed to come to fruition due to low ticket sales, beginning in 2005, Lollapalooza made Chicago its permanent home with a two-day festival. The next year saw the first three-day Lollapalooza, which has continued for a decade.

Chicago isn't Lollapalooza's only home. In recent years, outposts of the festival have also happened in Brazil, Chile, Argentina and Berlin.

The lineup for 2016's Lollapalooza has not yet been announced. That will be rolled out along with ticket information in the spring. Last year's Lollapalooza featured performances from a diverse set of artists, including Paul McCartney, Metallica, Florence and the Machine, Sam Smith, The Weeknd, Kid Cudi and more.

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