Alice Glass of the band Crystal Castles performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

The Chicago skyline behind the Lollapalooza Festival while a rainstorm approaches in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen)

Icona Pop played at Lollapalooza on Friday afternoon. The music festival started on Friday at Grant Park and runs until Sunday. | Alex Wroblewski~Sun-Times

Fans raise their hands during a performance by rock band American Authors at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The festival, which opened Friday, continues through Sunday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Smith Westerns played on Friday afternoon, the opening day of the music festival Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Papa Emeritus II of Ghost B.C. performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

Lollapalooza 2013 - Day 1

CHICAGO, IL - AUGUST 02: Caroline Hjelt and Aino Jawo of Icona Pop perform during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Caroline Hjelt and Aino Jawo of Icona Pop perform during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Aino Jawo and Caroline Hjelt of Icona Pop pose backstage during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

Icona Pop played at Lollapalooza on Friday afternoon. The music festival started on Friday at Grant Park and runs until Sunday. | Alex Wroblewski~Sun-Times

A boy cheers while Icona Pop plays at Lollapalooza on Friday afternoon at Grant Park. | Alex Wroblewski~Sun-Times

Cameron Omori, bassist for American indie rock band Smith Westerns performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen)

Cullen Omori, lead vocalist for American indie rock band Smith Westerns performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Smith Westerns played on Friday afternoon, the opening day of the music festival Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Rain poured down for a short time on Friday afternoon at Grant Park during the opening day of Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Robert DeLong performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, August 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Ioanna Gika of the US band IO Echo performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, August 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Papa Emeritus II of the Swedish band Ghost BC performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

A Nameless Ghoul of the Swedish band Ghost BC performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Papa Emeritus II of the Swedish band Ghost BC performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Lindsey Troy, left, and Julie Edwards of the rock duo Deap Valley performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, August 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Zac Barnett, lead singer of American Authors performs at Lollapalooza in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen)

Festival attendees stand in ponchos during a brief rain storm at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Festival attendees dance in ponchos during a brief rain storm at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Alice Glass, vocalist for Canadian electronic band Crystal Castles interacts with fans after jumping off stage during their performance at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen)

Fans at Lollapalooza Festival wait for the next act to begin in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen)

Bernard Sumner of the English rock band New Order performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP)

CHICAGO, IL - AUGUST 02: Dan Reynolds of Imagine Dragons performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Dan Reynolds of Imagine Dragons performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Josh Homme of Queens of the Stone Age performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Josh Homme of Queens of the Stone Age performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

Eliza Huber laughs after playing in the mud at Grant Park during Lollapalooza which started on Friday afternoon and runs until Sunday. | Alex Wroblewski~Sun-Times

From left to right: Henry Lagor, Eliza Huber, and Kevin Brangg laughs play in the mud at Grant Park during Lollapalooza which started on Friday afternoon and runs until Sunday. | Alex Wroblewski~Sun-Times

CHICAGO, IL - AUGUST 02: (Editor's Note: Multiple exposeure made in camera) Trent Reznor of Nine Inch Nails performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Trent Reznor of Nine Inch Nails performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: (Editor's Note: Multiple exposeure made in camera) Trent Reznor of Nine Inch Nails performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 02: Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

Stephanie Augustine dances in the rain on Friday afternoon at Grant Park during the opening day of Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Rain poured down for a short time on Friday afternoon at Grant Park during the opening day of Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Smith Westerns played on Friday afternoon, the opening day of the music festival Lollapalooza which runs until Sunday. | Alex Wroblewski~Sun-Times

Grant Park is flooded with music fans, as Lollapalooza kicked off on Friday afternoon and runs until Sunday. | Alex Wroblewski~Sun-Times