Live Earth Around The World

Rihanna performs on stage at the Tokyo leg of the Live Earth series of concerts, at Makuhari Messe, Chiba on July 7, 2007 in Tokyo, Japan.

Xzibit performs on stage at the Tokyo leg of the Live Earth series of concerts, at Makuhari Messe, Chiba on July 7, 2007 in Tokyo, Japan.

Chester Bennington of Linkin Park was one of the performers at the Live Earth concert in Tokyo, Japan on July 7, 2007. Some of the biggest names in the music world have committed to performing in Live Earth concerts in Sydney, Tokyo, Shanghai, Hamburg, London, Johannesburg, New York, Washington and Rio de Janeiro, which are expected to attract an audience of two billion people.

Mike Shinoda of Linkin Park on stage during the Live Earth concert in Tokyo, Japan on July 7, 2007.

Singer Sarah Brightman of England performs on stage at the China leg of the Live Earth series of concerts at the Oriental Pearl Tower on July 7, 2007 in Shanghai, China.

Rapper Snoop Dogg backstage at the Hamburg Live Earth concert at the HSH Nordbank Arena on July 7, 2007 in Hamburg, Germany. An estimated 2 billion people experienced the 24-hour marathon of concerts live, on television, via the Internet or on the radio.

Enrique Iglesias performs at the Hamburg Live Earth concert at the HSH Nordbank Arena on July 7, 2007 in Hamburg, Germany.

Actress Toni Collette performs with her band, Toni Collette & The Finish, on stage at the Australian leg of the Live Earth series of concerts, at Aussie Stadium, Moore Park on July 7, 2007 in Sydney, Australia.

An aerial view of the Live Earth concert in Rio de Janeiro July 7, 2007, at the Copacabana beach. Live Earth stars delivered a chorus of appeals for action against the global problem of climate change on Saturday during a 24-hour marathon of concerts around the world.

Brazilian pop star Xuxa, a favorite of generations who grew up watching her popular children show throughout Latin America in the 1980s and 1990s, performs at the Live Earth concert in Rio de Janeiro on Copacabana beach.

British pop legend Yusuf Islam, formerly known as Cat Stevens, performs during the Live Earth concert in Hamburg July 7, 2007.

Former U.S. vice president and environmental activist Al Gore holds up his right hand as he recites a pledge to protect the planet from global warming July 7, 2007 at the National Museum of the American Indian in Washington, DC. Gore opened the Washington leg of the worldwide Live Earth concerts that he helped organize.

Country music singer Garth Brooks, left, adjusts a microphone for Trish Yearwood, right, before performing at a "Live Earth" concert July 7, 2007 at the National Museum of the American Indian in Washington, D.C.