Sara Quin of Tegan & Sara performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Fans listen as Jake Bugg performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Jake Bugg performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Tegan Quin of Tegan & Sara performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Jake Bugg performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Jake Bugg performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Jake Bugg performs at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Tegan & Sara perform at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Tegan Quin of Tegan & Sara takes the stage before playing at Grant Park on the third day of Lollapaloza. | Alex Wroblewski~Sun-Times

Sara Quin of the Canadian band Tegan and Sara performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Daniel Varas of the Chilean electro-pop band Astro performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Andy Nusser, vocalist of the Chilean electro-pop band Astro performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Lianne La Havas performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Lianne La Havas performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

Natalie Bergman of the band Wild Belles performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug. 4, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP)

Natalie Bergman of the band Wild Belles performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug. 4, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP)

Elliot Bergman of the band Wild Belles performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug. 4, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP)

Andy Nusser, vocalist of the Chilean electro-pop band Astro performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Daniel Varas of the Chilean electro-pop band Astro performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Daniel Varas of the Chilean electro-pop band Astro performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Chilean electro-pop band Astro poses for a portrait at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Sara Quin of the Canadian band Tegan and Sara performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

A Lollapalooza balloon between stages at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Tegan Quin of the Canadian band Tegan and Sara performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Tegan and Sara perform at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Tegan Quin of the Canadian band Tegan and Sara performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Robert Smith of The Cure performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)

CHICAGO, IL - AUGUST 04: 2 Chainz performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 04: Zachary Cole Smith of DIIV performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 04: Sky Ferreira looks on as DIIV performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

CHICAGO, IL - AUGUST 04: Ezra Koenig of Vampire Weekend performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images)

Vampire Weekend performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen)

Joe Newman of the band Alt-J performs on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP)