Fans watch the british band Mumford and Sons performing at the Optimus Alive music festival at Alges, on the outskirts of Lisbon on July 14. (Patricia De Melo Moreira/AFP/Getty Images) #

United States singer Erykah Badu performs during the three-day Elevation music festival near the Bulgarian capital Sofia on June 24. (Stoyan Nenov/Reuters) #

A visitor swings her hair while headbanging in the front row of the Wacken Open Air festival on Aug. 2. The small northern town is hosted one of the world's biggest heavy metal festivals. (Patrick Lux/AFP/Getty Images) #

Alison Mosshart of rock duo The Kills performs during their concert at the Optimus Alive music festival in Lisbon, on July 15. (Armando Franca/Associated Press) #

Director of Music, Simon Desorgher plays the flute inside Colorscape on the front lawn of Holburne Museum on Aug. 17 in Bath, England. Billed as the museum's summer event, the Colorscape music festival is a labyrinth of inflatable interconnected chambers flooded with colored light which forms a walk-in sculpture of color, light and sound. (Matt Cardy/Getty Images) #

Giant bubbles float amongst visitors as they enjoy the entertainment amongst the classical architecture of Portmeirion during the Number Six festival on Sept. 15 in Porthmadog, United Kingdom. The classic Italianate village of Portmeirion in North Wales is staging the first ever festival named after the famous 1960's cult TV series 'The Prisoner' which was filmed in the village. The three day festival is a kaleidoscope of entertainment of music, art and performances ranging from poetry to pop and classical music. (Christopher Furlong/Getty Images) #

Brandon Boyd of rock band Incubus performs during the St. Gallen Open Air Music Festival in St. Gallen, Switzerland on June 29. (Ennio Leanza/Associated Press) #

People attend a concert of British band Bloc Party during the Rock-en-Seine music festival on Aug. 24 in Saint-Cloud near Paris. (Thomas Samson/AFP/Getty Images) #

A member of the Preservation Hall Jazz Band performs at the New Orleans Jazz and Heritage Festival in New Orleans on May 5. For five decades, Preservation Hall has served up New Orleans jazz for music lovers the world over. The New Orleans Jazz and Heritage Festival, on its closing weekend, marked that achievement by showcasing the world-renowned Preservation Hall Jazz Band in concert twice. (Gerald Herbert/Associated Press) #

Rock fans gesture during a performance at the Play Rock music festival 2012 in Hefei, Anhui province on June 29. (Jianan Yu/Reuters) #

Kimbra performs on stage at Splendour In The Grass on July 27 in Byron Bay, Australia. (Matt Roberts/Getty Images) #

Cedric Bixler-Zavala of At The Drive-In performs on stage at Splendour In The Grass on July 27 in Byron Bay, Australia. (Matt Roberts/Getty Images) #

Colombia singer Zero of the band Koyi K Utho performs during a concert in the Rock al Parque music festival in Bogota on June 30. About 400,000 people were expected to attend the free three-day festival in Bogota. (Fredy Builes/Reuters) #

Fans react to a band at the Wacken Open Air heavy metal music festival on Aug. 3 in Wacken, Germany. Approximately 75,000 heavy metal fans from all over the world have descended on the north German village of 1,800 residents for the annual three-day fest. (Patrick Lux/Getty Images) #

Roger (47) from Sweden, in usual days is a craftsman, attends the Wacken Open Air heavy metal music fest on August 3. (Patrick Lux/Getty Images) #

Inmates play and dance the salsa at the Sarita Colonia prison in Lima's port of Callao on July 20. A salsa music festival was held to encourage the inmates in their rehabilitation process, according to the prison. (Enrique Castro-Mendivil/Reuters) #

Angolan band, Buraka Som Sistema, performs at the Optimus Alive music festival at Alges, on the outskirts of Lisbon on July 13. (Patricia De Melo Moreira/AFP/Getty Images) #

The annual Electric Zoo Festival featuring electronic and dance music including 'dubstep', was held on Randall's Island over the Labor Day Weekend. Festival-goers wave their hands as confetti flies through the air during Above & Beyond's performance. (Karsten Moran for The New York Times) #

British musician Adrian Nicholas Matthews Thaws also known as Tricky performs at the Optimus Alive music festival at Alges on the outskirts of Lisbon on July 14. (Patricia De Melo Moreira/AFP/Getty Images) #

Artists perform during the Spasskaya Tower international military and music festival on Red Square in Moscow on Sept. 1. (Kirill Kudryavtsev/AFP/Getty Images) #

Anthony Gonzalez, lead singer of French band M83 performs performs during the 37th Paleo music festival in Nyon on July 17. (Denis Balibouse/Reuters) #

The annual Electric Zoo Festival featuring electronic and dance music including 'dubstep', was held on Randall's Island over the Labor Day Weekend. Above & Beyond perform on Sept. 1. (Karsten Moran for The New York Times) #

Military musicians from Poland rehearse inside a tent during the Spasskaya Tower international military and music festival on Red Square in Moscow on Sept. 6. (Andrey Smirnov/AFP/Getty Images) #

United States singer Frank Ocean performs at the Oya music festival in Oslo on Aug. 9. (Vegard Grott/Reuters) #

Eric Yttri (right) plays a flaming tuba during the Burning Man 2012 Fertility 2.0 arts and music festival in the Black Rock Desert of Nevada on Aug. 30. More than 60,000 people from all over the world have gathered at the sold out festival, which is celebrating its 26th year, to spend a week in the remote desert cut off from much of the outside world to experience art, music and the unique community that develops. (Jim Urquhart/Reuters) #

Divers strum on an artist's marine-themed musical instruments at the Lower Keys Underwater Music Festival in the Florida Keys National Marine Sanctuary off Big Pine Key, Fl. on July 14. About 300 divers and snorkelers listened to a local radio station's four-hour broadcast piped beneath the sea via underwater speakers suspended from boats. (Bill Keogh/Florida Keys News Bureau) #

Maalem Hamid Kasri of the Gnaoua group performs in Essaouira on June 23 at the start of the Gnaoua World Music Festival. The annual festival provides an opportunity for Gnaoua musicians to perform to international audiences and to play with foreign musicians. (Fadel Senna/AFP/Getty Images) #

Festival goers watch as buskers perform during the first day of the Hop Farm music festival in Paddock Wood, Kent on June 29. (Ben Stansall/AFP/Getty Images) #

Rita Ora performs at the Made In America music festival on Sept. 2 in Philadelphia, Pa. (Drew Gurian/Invision via Associated Press) #

Patti Smith performs on June 30 during the second day of the Hop Farm music festival in Paddock Wood, Kent. (Ben Stansall/AFP/Getty Images) #

Fans look on as the band LMFAO performs at the Optimus Alive music festival at Alges, on the outskirts of Lisbon on July 13. (Patricia De Melo Moreira/AFP/Getty Images) #

Singer LInda Perry performs "L.A. Woman" with The Doors during the Sunset Strip Music Festival launch party celebrating The Doors at the House of Blues on Aug. 16 in West Hollywood, Calif. (Chris Pizzello/Invision via Associated Press) #

Thom Yorke, lead singer of the British band Radiohead, performs at the Optimus Alive music festival at Alges, on the outskirts of Lisbon on July 15. (Patricia De Melo Moreira/AFP/Getty Images) #

Frah, singer of French electro- rock band Shaka Ponk, performs on the stage during the Francofolies music festival, in La Rochelle, western France on July 15. (Xavier Leoty/AFP/Getty Images) #

United States singer Lauryn Noel Hill alias Ms. Lauryn Hill performs during the OpenAir music festival in Frauenfeld, Switzerland on July 7. (Ennio Leanza/Keystone via Associated Press) #

DJ Steve Aoki embraces a fan during his performance at the Sunset Strip Music Festival on Aug. 18 in West Hollywood, Calif. (Chris Pizzello/Invision/Associated Press) #

Zac Brown (right) and Jimmy De Martini of Zac Brown Band perform during the Country Music Association Music Festival in Nashville, Tenn. on June 7. (Harrison Mcclary/Reuters) #

People run to the stage prior to the Red Hot Chili Peppers's concert during the Rock in Rio music festival in Arganda del Rey, on the outskirts of Madrid, Spain on July 7. (Andres Kudacki/Associated Press) #

German electronic music project Kraftwerk performs on Aug. 25 during the Zurich Openair music festival in Ruemlang near Zurich, Switzerland. (Steffen Schmidt/Keystone via Associated Press) #

Marilyn Manson is surrounded by fog as he performs at the Sunset Strip Music Festival on Aug. 18 in West Hollywood, Calif. (Chris Pizzello/Invision/Associated Press) #

People attend a performance by the punk rock band Social Distortion during the Rock-en-Seine music festival on Aug. 26 in Saint-Cloud, near Paris. (Thomas Samson/AFP/Getty Images) #