Roger Daltrey of The Who on stage at a private acoustic performance in London to launch the band's 2007 European tour Feb. 8, 2007.
Jack Black of Tenacious D performs on stage at the Hordern Pavilion in Sydney, Australia, on Jan. 16, 2007.
Sting performs during his European tour for "Songs From the Labyrinth" in Basle, Switzerland, on Feb. 19, 2007.
Roger Waters, formerly of Pink Floyd, performs during the Sydney leg of his "Dark Side of the Moon Tour" at Acer Arena in Sydney, Australia, on Jan. 25, 2007.
Roger Waters, formerly of Pink Floyd, performs during the Auckland leg of his "Dark Side Of The Moon Tour" at North Harbour Stadium in Auckland, New Zealand, on Jan. 29, 2007.
Roger Waters, one of the founders of Pink Floyd, continues the "Dark Side of the Moon" tour in Mumbai, India, Sunday, Feb. 18, 2007. Waters also performed in Bangalore in 2002.
Rihanna performs at the Point Theatre in Dublin, Ireland, on Feb. 2, 2007.
Ricky Martin performs during the first concert of his Black and White tour in San Juan, Puerto Rico, on Feb. 9, 2007.
Musical performer Peaches, keyboardist J.D. Samson and drummer Samantha Maloney perform on stage at Home nightclub in Sydney, Australia, on Jan. 24, 2007.
Norah Jones performs during a concert in Paris on Jan. 20, 2007.
Singer Keith Urban performs at the Mod Club in Toronto on Valentine's Day, Feb. 14, 2007.
Joss Stone performs live at the Bowery Ballroom in New York City on Feb. 8, 2007.
John Mayer performs during Apple's unveiling of the new iPhone during Apple CEO Steve Jobs' keynote address at MacWorld Conference & Expo in San Francisco on Jan. 9, 2007.
Il Divo plays at the Sydney Entertainment Centre on Feb. 9, 2007, in Sydney, Australia. From left, they are Sebastien Izambard, Urs Toni, Carlos Marin and David Miller.
Gwen Stefani performs during the NRJ awards ceremony Jan. 20, 2007, in Cannes, southern France.
Eric Clapton, right, performs with a band member at Shanghai's Grand Stage during his only concert in China on Jan. 20, 2007.
Eric Clapton performs at Members Equity Stadium in Perth, Australia, on Feb. 11, 2007. The 2007 tour is Clapton's third tour in Australia and his first tour in Australia since 1990.
Blues singer and guitarist B.B. King performs at the Kodak Theatre on Jan 6, 2007, in Los Angeles.
Pete Doherty of Babyshambles plays a surprise gig to unsuspecting pubgoers at Camden's Dublin Castle in London on Jan. 11, 2007.
Willie Nelson performs with Wynton Marsalis, not shown, during a concert Jan. 12, 2007, in the Allen Room at the Home of Jazz at Lincoln Center in New York City.