Sugarland's Jennifer Nettles and Kristian Bush perform during a concert at Atlanta's Centennial Olympic Park, an event held in conjunction with NCAA Final Four festivities, on April 1, 2007.
A woman on stage sings along as LL Cool J performs during a concert held in conjunction with NCAA Final Four festivities in Atlanta on April 1, 2007.
Canadian poet and singer Leonard Cohen, left, sings with Anjani during her concert in Warsaw, Poland, on March 31, 2007.
Cuban musician Pablo Milanes performs during a concert in Tegucigalpa, Honduras, on March 30, 2007. Milanes is one of Cuba's top composers and a founder of the Nueva Trova musical movement.
Neil Tennant, left, and Chris Lowe of The Pet Shop Boys perform on stage as part of the V Festival sideshows at the St James Complex in Auckland, New Zealand, on March 29, 2007. Many artists en route to Australia's V festival play for New Zealand audiences first.
Canadian singer Bryan Adams performs on stage during a concert at the Arena in Geneva, Switzerland, on March 29, 2007.
Colombian-born pop star Shakira performs at a concert near the Giza pyramids in Cairo, Egypt, on March 28, 2007.
Jon Bon Jovi, left, and Richie Sambora perform with other musicians in a tribute concert in Nashville, Tenn., on March 27, 2007. The concert was held to raise money on behalf of the Buck Jones Memorial Fund, set up to benefit the family of the country singer after he was killed in a traffic accident a week earlier.
Elton John appears on stage as confetti falls during his concert in New York's Madison Square Garden on March 25, 2007. A banner was raised to celebrate John's 60th birthday and his record-breaking 60th concert at the Garden.
Christian rock band Mercy Me's lead singer, Bart Marshall Millard, performs at the Wachovia Arena in Wilkes-Barre, Pa., on March 25, 2007.
Fergie holds a bouquet of flowers following her performance at G-A-Y at The Astoria in London on March 24, 2007.
Jazz musician Al Jarreau performs on stage at King's Park in Perth, Australia, on March 24, 2007. Jazz legends George Benson and Jarreau recently worked together on their "Givin It Up" album.
Jazz musician George Benson performs on stage in concert at King's Park in Perth, Australia, on March 24, 2007. Benson and Al Jarreau, who was also performing, recently worked together on their "Givin It Up" album.
Australian country singer Keith Urban performs at Martin Place in Sydney on March 23, 2007.
Corinne Bailey Rae performs live at the Carling Hammersmith Apollo in London on March 22, 2007.
Puerto Rican singer Ricky Martin performs during his concert in Panama City on March 20, 2007.
Musician Sean "P. Diddy" Combs performs on stage of Zurich's Hallenstadion in Switzerland on March 19, 2007.
Country singer Dolly Parton performs during her concert in Ijsselhallen in Zwolle, Netherlands, on March 18, 2007, as part of her European tour.
Actor and musician Steven Seagal performs live with his band, Thunderbox, at the Shepherds Bush Empire in London on March 18, 2007.
Musical satirist Weird Al Yankovic performs on stage at the Enmore Theatre in Sydney, Australia, on March 12, 2007. Yankovic, who returned to Australia for the first time since 2005, is promoting his latest send-up album, "Straight Outta Lynwood."