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Joss Stone performs on stage at an open air music festival in Berne, Switzerland on July 22, 2007.
Credit: AP Photo/Peter Schneider
Anthony Kiedis, right, lead singer of U.S. rock band Red Hot Chili Peppers, performs at Roskilde Festival on July 7, 2007 in Roskilde, Denmark.
Credit: AP Photo/Carsten Snejbjerg
Soul singer India Arie performs at the 41th Montreux Jazz Festival at Miles Davis hall in Montreux, Switzerland on July 8, 2007.
Credit: AP Photo/Sandro Campardo
Elton John smiles in Rostov-on-Don, south of Moscow, on July 12, 2007.
Credit: AP Photo
Joan Osborne performs songs from her new album "Breakfast in Bed" at the Hard Rock Cafe in La Jolla, Calif. on July 18, 2007. Her appearance was part of a "Live at Hard Rock Cafe" series.
Credit: AP Photo/Fred Greaves
Elvis Costello performs at the Blue Balls music festival in Lucerne, Switzerland on July 25, 2007.
Credit: AP Photo/Sigi Tischler
Lauryn Hill appears at the Live at Sunset Open Air Festival in Zurich, Switzerland on July 12, 2007.
Credit: AP Photo/Walter Bieri
Marilyn Manson, right, and Alice Cooper get together on stage in Bucharest, Romania on July 1, 2007.
Credit: AP Photo/Vadim Ghirda
Pink performs during the Moon and Stars open air concert on Piazza Grande in Locarno, Switzerland on July 12, 2007.
Credit: AP Photo/Samuel Golay
Sir Paul McCartney takes the stage at the iTunes Festival at the Institute of Contemporary Arts in London on July 5, 2007.
Credit: Getty Images/Dave Hogan
Norah Jones opens the first date of her tour of Germany at the Olympic hall in Munich on July 16, 2007.
Credit: AP Photo/Christof Stache
The Rolling Stones take their "Bigger Bang" tour to Warsaw, Poland, on July 25, 2007.
Credit: AP Photo/Czarek Sokolowski
Mary J. Blige performs at The Joint inside the Hard Rock Hotel & Casino on July 14, 2007 in Las Vegas. She is touring to promote her latest album, "Reflections - A Retrospective."
Credit: Getty Images/Ethan Miller
Beastie Boys Adrock, left, and Mike D perform at the Moon and Stars open air concert on Piazza Grande in Locarno, Switzerland on July 11, 2007.
Barbra Streisand appears at The 02 Arena in London on July 18, 2007.
Credit: Getty Images/Jo Hale
Donald Fagen of Steely Dan performs at the Stockholm Jazz Festival on July 17, 2007.
Credit: AP Photo/Patrick Sorquist
Avril Lavigne sings at the Gurten open air music festival on July 19, 2007 in Bern, Switzerland.
Credit: AP Photo/Peter Klaunzer
Jack White of the White Stripes performs at Madison Square Garden in New York on July 24, 2007.
Credit: AP Photo/Stephen Chernin
Tori Amos performs during the 41th Montreux Jazz Festival on July 11, 2007 in Montreux, Switzerland.
Credit: AP Photo/Dominic Favre
Sting appears with The Police on July 19, 2007, in Philadelphia.
Credit: AP Photo/Rusty Kennedy