"The Edge", guitarist of Irish Band U2

"The Edge", guitarist of Irish Band U2 performs on stage on February 13, 2011 at Soccer City Stadium in Soweto, South Africa. AFP PHOTO / STEPHANE DE SAKUTIN (Photo credit should read STEPHANE DE SAKUTIN/AFP/Getty Images)

Irish rock band U2 lead singer Bono (L)

Irish rock band U2 lead singer Bono (L) and U2 Guitarist The Edge (R) perform during their concert at the Green Point stadium in Cape Town on February 18, 2011, as part of their 360 degrees world tour. AFP PHOTO / RODGER BOSCH (Photo credit should read RODGER BOSCH/AFP/Getty Images)

Irish rock band U2 guitarist The Edge pe

Irish rock band U2 guitarist The Edge performs on stage during the 360° Tour at Ciudad de La Plata stadium, in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

Irish rock band U2 guitarist The Edge pe

Irish rock band U2 guitarist The Edge performs on stage during the 360° Tour at Ciudad de La Plata stadium, in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

Premiere Of "Lotus Eaters" At The 2011 Tribeca Film Festival

NEW YORK, NY - APRIL 21: U2's The Edge (L) attends the premiere of "Lotus Eaters" during the 2011 Tribeca Film Festival at SVA Theater on April 21, 2011 in New York City. (Photo by Dario Cantatore/Getty Images)

Irish singer Bono of the Rock band U2 pe

Irish singer Bono of the Rock band U2 perfom on their 360Tour at the Azteca Stadium in Mexico City, on May 11, 2011. AFP PHOTO/Alfredo Estrella (Photo credit should read ALFREDO ESTRELLA/AFP/Getty Images)

Irish singer Bono of the Rock band U2 pe

Irish singer Bono of the Rock band U2 perfom on their 360Tour at the Azteca Stadium in Mexico City, on May 11, 2011. AFP PHOTO/Alfredo Estrella (Photo credit should read ALFREDO ESTRELLA/AFP/Getty Images)

Irish Rock band U2 perfom on their 360To

Irish Rock band U2 perfom on their 360Tour at the Azteca Stadium in Mexico City, on May 11, 2011. AFP PHOTO/Alfredo Estrella (Photo credit should read ALFREDO ESTRELLA/AFP/Getty Images)

Bono, singer of the Irish rock band U2 p

Bono, singer of the Irish rock band U2 performs on stage during the 360° Tour at Ciudad de La Plata stadium in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

Bono (L) singer of the Irish rock band U

Bono (L) singer of the Irish rock band U2 performs next to bassist Adam Clayton on stage during the 360° Tour at Ciudad de La Plata stadium, in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

Irish Rock band U2 perfom on their 360To

Irish Rock band U2 perfom on their 360Tour at the Azteca Stadium in Mexico City, on May 11, 2011. AFP PHOTO/Alfredo Estrella (Photo credit should read ALFREDO ESTRELLA/AFP/Getty Images)

Irish singer Bono of the Rock band U2 pe

Irish singer Bono of the Rock band U2 perfom on their 360Tour at the Azteca Stadium in Mexico City, on May 11, 2011. (Photo credit: ALFREDO ESTRELLA/AFP/Getty Images)

Irish rock band U2 guitarist The Edge pe

Irish rock band U2 guitarist The Edge performs on stage during the 360° Tour at Ciudad de La Plata stadium, in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

Irish rock band U2 singer Bono performs

Irish rock band U2 singer Bono performs on stage during the 360° Tour at Ciudad de La Plata stadium, in La Plata, Argentina on April 2, 2011. AFP PHOTO / JUAN MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

2011 Billboard Music Awards - Press Room

LAS VEGAS, NV - MAY 22: Musicians Larry Mullen Jr, Adam Clayton, Bono and The Edge of the band U2 pose in the press room with the Touring Top Artist Award during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images)

2011 Billboard Music Awards - Press Room

LAS VEGAS, NV - MAY 22: Musician Bono of the band U2 poses in the press room with the Touring Top Artist Award during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images)

2011 Billboard Music Awards - Show

LAS VEGAS, NV - MAY 22: Musicians The Edge, Bono, Larry Mullen Jr. and Adam Clayton of the band U2 accept the Touring Top Artist Award onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

2011 Billboard Music Awards - Show

LAS VEGAS, NV - MAY 22: Musicians The Edge, Bono, Larry Mullen Jr. and Adam Clayton of the band U2 accept the Touring Top Artist Award onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

2011 Billboard Music Awards - Show

LAS VEGAS, NV - MAY 22: U2 singer Bono appears in a video introducing a performance by Beyonce Knowles during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

Fox's "American Idol" 2011 Finale - Results Show - Press Room

LOS ANGELES, CA - MAY 25: Singer Bono of U2 poses in the press room during Fox's "American Idol" season 10 finale results show held at Nokia Theatre LA Live on May 25, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

Fox's "American Idol" 2011 Finale - Results Show - Press Room

LOS ANGELES, CA - MAY 25: Musician The Edge of U2 poses in the press room during Fox's "American Idol" season 10 finale results show held at Nokia Theatre LA Live on May 25, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

Fox's "American Idol" 2011 Finale - Results Show - Press Room

LOS ANGELES, CA - MAY 25: (L-R) Musician Bono of U2, actor Reeve Carney, and musician The Edge of U2 pose in the press room during Fox's "American Idol" season 10 finale results show held at Nokia Theatre LA Live on May 25, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

Fox's "American Idol" 2011 Finale - Results Show - Press Room

LOS ANGELES, CA - MAY 25: Singer Bono of U2 poses in the press room during Fox's "American Idol" season 10 finale results show held at Nokia Theatre LA Live on May 25, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: Ali Hewson and Bono of U2 attend "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: Morleigh Steinberg and The Edge of U2 attend "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: (L-R)Ali Hewson, Bono of U2, Eve Hewson and Jordan Hewson attend "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

(credit: Jamie McCarthy/Getty Images)

NEW YORK, NY - JUNE 14: Bono of U2 attends "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: The Edge of U2,Bono of U2,directors Philip William McKinely and Julie Taymor on stage at "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: The Edge and Bono of U2 on stage at "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

"Spider-Man Turn Off The Dark" Broadway Opening Night

NEW YORK, NY - JUNE 14: Director Julie Taymor and Bono of U2 on stage at "Spider-Man Turn Off The Dark" Broadway opening night at Foxwoods Theatre on June 14, 2011 in New York City. (Photo by Jamie McCarthy/Getty Images)

U2 & Jay-Z Perform In Auckland

AUCKLAND, NEW ZEALAND - NOVEMBER 25: (L-R) The Edge, Bono and Larry Mullen Jr of U2 perform on stage at Mt Smart Stadium on November 25, 2010 in Auckland, New Zealand. (Photo by Sandra Mu/Getty Images)

U2 and Jay-Z Perform In Melbourne

MELBOURNE, AUSTRALIA - DECEMBER 01: Bono, The Edge and Adam Clayton of U2 perform on stage at Etihad Stadium on December 1, 2010 in Melbourne, Australia. (Photo by Mark Metcalfe/Getty Images)

U2 and Jay-Z Perform In Melbourne

(credit: Mark Metcalfe/Getty Images)

MELBOURNE, AUSTRALIA - DECEMBER 01: (EDITORS NOTE: THIS BLACK AND WHITE IMAGE WAS CREATED FROM ORIGINAL COLOUR FILE) Bono and The Edge of U2 perform on stage at Etihad Stadium on December 1, 2010 in Melbourne, Australia. (Photo by Mark Metcalfe/Getty Images)

US talk-show star Oprah Winfrey (R) is h

US talk-show star Oprah Winfrey (R) is hugged by U2 frontman Bono during the filming of 'The Oprah Winfrey Show' at the Sydney Opera House on December 14, 2010. Winfrey, age 56, named herself as Australia's new ambassador to the world, saying her visit Down Under would reap huge rewards for Australia's image and its tourism coffers. AFP PHOTO / Torsten BLACKWOOD (Photo credit should read TORSTEN BLACKWOOD/AFP/Getty Images)