Lollapalooza 2010

Crowds are seen during Lollapalooza 2010 in Chicago on Aug. 6, 2010. The annual music festival runs from Aug. 6-8 in Chicago's Grant Park, and will feature acts including Lady Gaga, Arcade Fire, MGMT and The Strokes.

A Lollapalooza sign is seen in Chicago on Aug. 6, 2010, the first day of the annual festival.

Crowds of people enter Chicago's Grant Park for the Lollapalooza 2010 music festival on Aug. 6, 2010.

Lady Gaga fans are seen at Lollapalooza on Aug. 6, 2010. The singer is scheduled to take the stage on Friday, the first night of the weekend-long music festival.

Jimmy Cliff performs at the Lollapalooza music festival in Chicago on Friday, August 6, 2010.

Dan Auerbach of The Black Keys performs at the Lollapalooza music festival in Chicago on Friday, August 6, 2010.

Are they (still) not men? They are Devo. Bob Mothersbaugh performs at Lollapalooza in Chicago, Friday, Aug. 6, 2010.

The group Devo performs at Lollapalooza in Chicago, FRiday, Aug. 6, 2010.

512_AP100806117618(2).jpg — AP Photo/Nam Y. Huh

Lady Gaga performs during the fifth annual concert festival at Lollapalooza in Grant Park Friday, Aug. 6, 2010., in Chicago.

512_gaga_103277665(2).jpg — Tim Mosenfelder/Getty Images

Lady Gaga performs as part of Lollapalooza 2010 at Grant Park in Chicago, August 6, 2010.

Lady Gaga performs during the fifth annual concert festival at Lollapalooza in Grant Park Friday, Aug. 6, 2010., in Chicago.

Lady Gaga performs as part of Lollapalooza 2010 Friday, August 6, 2010 in Chicago, Illinois.

This is not Lady Gaga.

Canned hair at Lollapalooza on Friday.

The Strokes perform at Lollapalooza on Friday, Aug. 6, 2010 in Chicago.

Drummer Fabrizio Moretti of The Strokes performs at the Lollapalooza music festival Friday, Aug. 6, 2010 in Chicago.

The Strokes' Julian Casablancas performs at Lollapalooza on Friday, Aug. 6, 2010 in Chicago.

Fans enjoy The Strokes at Lollapalooza on Friday, Aug. 6, 2010 in Chicago.

Fans obtain photographic proof that they were indeed at Lollapalooza Saturday.

Laurent Brancowitz of Phoenix performs at the Lollapalooza music festival Saturday, Aug. 7, 2010.

Thomas Mars of Phoenix performs at the Lollapalooza music festival in Chicago on Saturday, August 7, 2010.

A fan watches Green Day's performance at Lollapalooza in Grant Park Saturday, Aug. 7, 2010, in Chicago.

Billie Joe Armstrong, left, and Mike Dirnt of Green Day perform during Lollapalooza in Grant Park Saturday, Aug. 7, 2010, in Chicago.

Billie Joe Armstrong of Green Day performs during Lollapalooza in Grant Park Saturday, Aug. 7, 2010, in Chicago.

Dan Porterfield and Laura Spurlock paint each other at the Lollapalooza music festival in Chicago on Saturday, Aug. 6, 2010.

Britt Daniel of Spoon performs at the Lollapalooza music festival in Chicago on Saturday, August 7, 2010.

Andrew Crawford, 18, of St. Louis, crowd surfs as Spoon performs at the Lollapalooza music festival in Chicago on Saturday, August 7, 2010.

Guitarist Jade Puget of AFI performs at the Lollapalooza music festival in Chicago Saturday, Aug. 7, 2010.

Lead vocalist Davey Havok of AFI performs at the Lollapalooza music festival Saturday, August 7, 2010.

Mike Ness of Social Distortion performs during Lollapalooza Saturday, Aug. 7, 2010, in Chicago.

Music fans watch PerryEtty vs Chris Cox's performance during the fifth annual concert festival at Lollapalooza in Grant Park Saturday, Aug. 7, 2010, in Chicago.

Sen Dog, left, and Eric Bobo of Cypress Hill perform at the Lollapalooza music festival in Grant Park Sunday, Aug. 8, 2010., in Chicago.

Erykah Badu performing at the Lollapalooza music festival in Grant Park Sunday, Aug. 8, 2010., in Chicago.

Andrew Well Vanwyngarden of MGMT performs on the final night of Lollapalooza in Chicago, Sunday, Aug. 8, 2010.

Matt Berninger of The National performs on the final night of Lollapalooza in Chicago, Sunday, Aug. 8, 2010.

Andrew Stockdale of Wolfmother performs during the Lollapalooza music festival in Grant Park on Sunday, Aug. 8, 2010., in Chicago.

Chris Cornell of Soundgarden performs during the Lollapalooza music festival in Grant Park on Sunday, Aug. 8, 2010, in Chicago.

Arcade Fire performs on the final night of Lollapalooza in Chicago, Sunday, Aug. 8, 2010.

Win Butler of Arcade Fire performs on the final night of Lollapalooza in Chicago, Sunday, Aug. 8, 2010.