Dave Grohl of the Foo Fighters performs at the KROQ Weenie Roast 2011 at the Verizon Wireless Amphitheater in Irvine, California on June 4, 2011.
Lil Wayne performs on Day 2 of the Bonnaroo Music And Arts Festival on June 10, 2011 in Manchester, Tennessee.
Eminem performs during Bonnaroo 2011 on June 11, 2011 in Manchester, Tennessee.
Katy Perry performs during her "California Dreams" tour at Nassau Veterans Memorial Coliseum on June 17, 2011 in Uniondale, New York.
Chris Martin and Jonny Buckland of Coldplay perform during the third day of Glastonbury Festival 2011 at Worthy Farm on June 25, 2011 in Glastonbury, United Kingdom.
Beyonce performs at the Glastonbury Festival on June 26, 2011 at Worthy Farm in Glastonbury, United Kingdom.
Ke$ha performs during Day 2 of the Wireless Festival on July 2, 2011 in London, United Kingdom.
Phish performs during the third and final day of their own Super Ball IX Festival on July 3, 2011 in Watkins Glen, New York.
Nick Harmer, Jason McGerr and Ben Gibbard of Death Cab For Cutie perform at Brixton Academy on July 7, 2011 in London, United Kingdom.
Bono and The Edge of U2 perform during their 360 Degree Tour at the Rogers Centre in Toronto, Canada on July 11, 2011.
Sheryl Crow and Kid Rock perform at PNC Bank Arts Center during Kid Rock's "Born Free" tour in Holmdel, New Jersey on July 12, 2011.
Chris Cornell of Soundgarden performs at The Forum on July 22, 2011 in Los Angeles, California.
Wayne Coyne of The Flaming Lips performs at PNC Bank Arts Center in Holmdel, NJ, July 28, 2011 during the first show of a two night shared-stage run with Weezer in New York and New Jersey.
Nicki Minaj performs at the Nassau Veterans Memorial Coliseum on August 2, 2011 in Uniondale, New York.
Matthew Bellamy of Muse performs during Lollapalooza 2011 on August 5, 2011 at Grant Park in Chicago, Illinois.
Taylor Swift performs during her "Speak Now" World Tour at Lincoln Financial Field in Philadelphia, Pennsylvania on August 6, 2011.
Justin Vernon of Bon Iver performs at the United Palace Theater on August 9, 2011 in New York City.
My Morning Jacket performs at Merriweather Post Pavilion in Columbia, Maryland on August 12th, 2011.
Deadmau5 performs at the Outside Lands Music Festival 2011 on August 14, 2011 in San Francisco, California.
Regine Chassagne and Win Butler of Arcade Fire perform at Day Three of the Outside Lands Music & Art Festival at Golden Gate Park on August 14, 2011 in San Francisco, California.