S3 security helped keep music fans hydrated while waiting in the hot sun before each concert. Friday August 3, 2012. I Scott Stewart~Sun-Times

A woman wears bandana before the Passion Pit concert, Friday, August 3, 2012. I Scott Stewart~Sun-Times

Music fans go wild during the Passion Pit concert at Lollapalooza Friday, August 3, 2012. I Scott Stewart~Sun-Times

Dancing to the music of Passion Pit, at Lollapalooza, Friday, August 3, 2012 I Scott Stewart~Sun-Times

Black Sabbath with Ozzy Osbourne rocks the Lollapalooza crowd Friday night. August 3, 2012. I Scott Stewart~Sun-Times

Black Sabbath with Ozzy Osbourne rocks the Lollapalooza crowd Friday night. August 3, 2012. I Scott Stewart~Sun-Times

Black Sabbath with Ozzy Osbourne rocks the Lollapalooza crowd Friday night. August 3, 2012. I Scott Stewart~Sun-Times

Passion Pit rocks the Lollapalooza crowd Friday evening, August 3, 2012. I Scott Stewart~Sun-Times

Passion Pit rocks the Lollapalooza crowd Friday evening, August 3, 2012. I Scott Stewart~Sun-Times

Caley Chelios dances to the music of Totally Enormous Extinct Dinosaurs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer holds a Chicago flag after entering the Lollapalooza grounds Friday, August 3, in Chicago. | John J. Kim~Sun-Times

A concergoer dances to the music of Totally Enormous Extinct Dinosaurs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers wave their hands while listening to Anamanaguchi at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Lindsey and Michael Stork of Ft. Worth, TX, navigate their way with a guide map at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A lone concertgoer dances in the middle of Columbus Dr. at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer exits a portable toilet at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers pass a merchandise tent at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A couple kiss while attending a concert at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Angelica Lavito of Lake Zurich cools off in front of a set of water mist fans at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer steps on fliers for an Art Institute of Chicago art exhibit at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Eddie Baker of Columbus, OH, stretches in preparation for walking through the Lollapalooza music festival grounds in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Eddie Baker of Columbus, OH (center left), stretches in preparation for walking through the Lollapalooza music festival grounds in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer dressed in 60s era clothing walks through the Lollapalooza music festival grounds in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers listen to Totally Enormous Extinct Dinosaurs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer smokes a cigar while listening to Totally Enormous Extinct Dinosaurs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A group of skateboarders fall after attempting tricks at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer waits for a band to start at Lollapalooza Friday, August 3, 2012. | John J. Kim~Sun-Times

Danny Stoffel of St. Charles holds an oversized cutout of Darth Vader at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer dressed in plastic beads and stuffed animals walks through the Lollapalooza music festival grounds in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer dressed in plastic beads and stuffed animals walks through the Lollapalooza music festival grounds in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Alec Gazda sits on a hammock at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers attend the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer poses unsolicited at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Two friends high five each other after entering the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers walk on Columbus Dr. at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer smokes marijuana from a pipe at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer smokes marijuana from a pipe at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Two concertgoers rest under the shade of a tree at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

A concertgoer waits for the Michael Kiwanuka show to begin at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers wait under the shade of a railing for the Michael Kiwanuka show to begin at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Mazlin Cimfel, 3, sits on her father T.J. Cimfel's shoulders at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers walk along Columbus Dr. at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Orlando Higginbottom of Totally Enormous Extinct Dinosaurs performs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Orlando Higginbottom of Totally Enormous Extinct Dinosaurs performs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Laura Mitchell of Toronto, Canada, eats a hot dog at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Orlando Higginbottom of Totally Enormous Extinct Dinosaurs performs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Fans cheer Haley Reinhart during her performance on the BMI stage at Lollapalooza on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

Haley Reinhart performs on the BMI stage at Lollapalooza on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

Chicago Friday 08.03.12. Haley Reinhart performs on the BMI stage at Lollapalooza on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

Chicago Friday 08.03.12. People walk by an inflatable Lollapalooza sign during the opening day of the event on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

Chicago Friday 08.03.12. T.J. Cimfel of Chicago carries his daughter Mazlin Cimfel while looking for snow cones at Lollapalooza on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

People walk the streets during the opening day of Lollapalooza on Friday, August 3, 2012, in Grant Park. | Buzz Orr~Sun-Times Media

Police officers stand in the shade at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Police officers check concertgoers' bags at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Michael Jones of Wax performs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

LDJS performs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Security personnel check concertgoers' bags at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Security personnel check concertgoers' wristbands for entry to the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times

Concertgoers pose for photographs at the Lollapalooza music festival in Grant Park Friday, August 3, 2012, in Chicago. | John J. Kim~Sun-Times