Tony Hajjar and Cedric Bixler-Zavala of At the Drive-In backstage at Lollapalooza in Chicago on August 5th, 2012.

Fun. pose backstage at Lollapalooza in Chicago on August 4th, 2012.

Tim Bergling, a.k.a. Avicii, at Lollapalooza in Chicago on August 5th, 2012.

Miike Snow pose at Lollapalooza in Chicago on August 5th, 2012.

Florence Welch backstage at Lollapalooza in Chicago on August 5th, 2012.

The Temper Trap at Lollapalooza in Chicago on August 3rd, 2012.

Dawes backstage at Lollapalooza in Chicago on August 3rd, 2012.

Lorin Ashton of Bassnectar backstage at Lollapalooza in Chicago on August 3rd, 2012.

James Mercer of the Shins backstage at Lollapalooza in Chicago on August 3rd, 2012.

Band of Skulls backstage at Lollapalooza in Chicago on August 3rd, 2012.

Oberhofer backstage at Lollapalooza in Chicago on August 3rd, 2012.

Fun. fans at Lollapalooza in Chicago on August 4th, 2012.

Fans gather despite the mud and rain at Lollapalooza in Chicago on August 4th, 2012.

Fans watch as Franz Ferdinand perform at Lollapalooza in Chicago on August 4th, 2012.

Metric backstage at Lollapalooza in Chicago on August 3rd, 2012.

Michael Kiwanuka backstage at Lollapalooza in Chicago on August 3rd, 2012.

Fans brave the weather at Lollapalooza in Chicago on August 4th, 2012.

The Big Pink backstage at FILTER & S.O.TERIK Present Lollapalooza After Party in Chicago on August 3rd, 2012.

Twin Shadow backstage at FILTER & S.O.TERIK Present Lollapalooza After Party in Chicago on August 3rd, 2012.

Zedd backstage at Lollapalooza in Chicago on August 3rd, 2012.

Fans make their way back to the main stage at Lollapalooza in Chicago on August 4th, 2012.

Fans make their way through the streets as Lollapalooza is evacuated due to extreme weather on August 4th, 2012.

Aaron Paul hangs out with friends backstage during At the Drive-In's set at Lollapalooza in Chicago on August 5th, 2012.

The Festival Express drives artists and a few other lucky festival goers across the grounds at Lollapalooza in Chicago.

LP enjoys some shade backstage at Lollapalooza in Chicago on August 4th, 2012.

Caroline Polachek and Patrick Wimberly of Chairlift backstage at the Rock the Vote Nights after party by CK One at the Hard Rock Hotel in Chicago on August 4th, 2012.

Aloe Blacc hangs out backstage at Lollapalooza in Chicago on August 4th, 2012.

Outasight backstage at Lollapalooza in Chicago on August 5th, 2012.

Justice backstage at Lollapalooza in Chicago on August 5th, 2012.