Country star Keith Urban [ tickets ] and alt-rockers Taking Back Sunday [ tickets ] are the latest acts to join the US installment of next month's 24-hour, seven-continent Live Earth [ tickets ] concert, which aims to bring attention to the climate crisis.

Urban will take time out of his "Love, Pain & the Whole Crazy World Tour" to appear at the July 7 event at New Jersey's Giants Stadium.

"Global warming is something that will ultimately affect all of us on this planet," Urban said in a statement. "And if there is one thing that music can do, it is to bring people together despite their politics or differences."

New York-based Taking Back Sunday has been a role model on the issue of global warming, implementing eco-friendly standards on its tours including recycling, organic-cotton merchandise alternatives, tree planting, carbon-offsetting programs and messaging campaigns, according to a press release.

"We all have our own beliefs, but I really feel that the issue of global warming is not a political issue up for debate," Taking Back Sunday guitarist Fred Mascherino said in a statement. "It's strictly a case of our survival in the near future, and it is proven scientific fact. The truth is that the more we know, the more hope we all have."

A few days ago, it was also announced that Metallica [ tickets ], Kasabian [ tickets ], Pussycat Dolls [ tickets ] and Terra Naomi [ tickets ] are the final acts added to the UK show.

The global concert will begin at Sydney's Aussie Stadium and continue across the continents with shows at Tokyo's Tokyo Dome; Shanghai's Oriental Pearl Tower; Johannesburg, South Africa's Cradle of Human Kind; London's Wembly Stadium; Hamburg, Germany's HSH Nordbank Arena; Rio de Janeiro, Brazil's Copacabana Beach; and the finale at East Rutherford, NJ's Giants Stadium. The lineup for each city is listed below.

Another Live Earth gig planned for Istanbul, Turkey, was recently canceled, according to Billboard, which said the Turkish press blamed a lack of governmental support and a failure to attract sponsorship from big businesses. Organizers are now seeking a site to erect giant screens in the city to show feeds from the other shows, the magazine reported. However, the promotions company behind the Turkish show reportedly said it was still willing to stage the concert if it could drum up the governmental support.

All the concerts will stream live at Live Earth's website and portions will air on NBC-TV in the US and on more than 120 television networks around the world, according to organizers, who expect an audience of more than 2 billion.

Live Earth lineups:

East Rutherford, NJ:
AFI
Akon
Alicia Keys
Bon Jovi
Dave Matthews Band
Fall Out Boy
John Mayer
KT Tunstall
Kanye West
Keith Urban
Kelly Clarkson
Ludacris
Melissa Etheridge
Roger Waters
Smashing Pumpkins
The Police
Taking Back Sunday

London, UK:
Beastie Boys
Black Eyed Peas
Bloc Party
Corinne Bailey Rae
Damien Rice
David Gray
Duran Duran
Foo Fighters
Genesis
James Blunt
John Legend
Kasabian
Keane
Madonna
Metallica
Paolo Nutini
Pussycat Dolls
Razorlight
Red Hot Chili Peppers
Snow Patrol
Spinal Tap
Terra Naomi

Shanghai, China:
12 Girls Band
Anthony Wong
Eason Chan
Evonne Hsu
Huang Xiao Ming
Joey
Sarah Brightman
Soler
Winnie Shin

Tokyo, Japan:
AI
Abingdon Boys School
Ai Otsuka
Ayaka
Bonnie Pink
Cocco
Genki Rockets
Kumi Koda
Linkin Park
Michael Nyman
Rihanna
Rip Slyme
Rize
UA
Yellow Magic Orchestra

Johannesburg, South Africa:
Angelique Kidjo
Baaba Maal
Danny K
Joss Stone
The Parlotones
The Soweto Gospel Choir
UB40
Vusi Mahlasela
Zola

Sydney, Australia:
Blue King Brown
Crowded House
Eskimo Joe
Ghostwriters
Jack Johnson
John Butler Trio
Missy Higgins
Paul Kelly
Sneaky Sound System
Toni Collette & The Finish
Wolfmother

Hamburg, Germany:
Chris Cornell
Jan Delay
Juli
Katie Melua
Lotto King Karl
Mana
Mando Diao
Michael Mittermeier
Reamonn
Roger Cicero
Sasha
Silbermond
Snoop Dogg