Former United States vice president Al Gore and a host of celebrities gathered today (Feb. 15) in Los Angeles to reveal plans for "Live Earth -- The Concert For A Climate In Crisis," a series of seven concerts set to take place across the globe on July 7.

The shows will feature more than 100 artists including Red Hot Chili Peppers, Bon Jovi, John Mayer, Corrine Bailey Rae, Black Eyed Peas, Fall Out Boy, Kelly Clarkson, and Faith Hill/Tim McGraw. Twenty five acts were announced at the press conference and more are expected.

The concerts -- set to take place in China (Shanghai), Africa (Johannesberg), England (London), Australia (Sydney), Brazil (TBA), Japan (TBA) and on the East coast of the United States -- will be broadcast across the world to approximately 2 billion viewers via television, radio and the Internet.

"All of the continents will be represented during this amazing 24 hours of concerts," Gore said during the conference. The seven concerts are part of the Save Our Selves (SOS) campaign, designed to raise awareness of global climate control.

Kevin Wall, CEO of Control Room, a provider of live digital entertainment, is producing Live Earth. Wall, who also won an Emmy as the worldwide the executive producer of Live 8, said "this is a launch event to move the planet forward...the media campaign we're going to launch is unprecedented."

Wall added that Live Earth venues for the concerts should be announced within the next month, and that ticket on-sales should begin in mid-March. "We haven't set the specific date because we want to go globally at the same time," he told Billboard.biz after the press conference. Ticket prices have not been announced.

Additionally, Wall says more cities could be added to the Live Earth lineup. "We're being approached by Rome, Istanbul ... and other European markets," he explains. "It's a little overwhelming."

Live Earth will be broadcast worldwide on MSN, which is a major sponsor of the event. MSN has services in more than 42 markets and 21 languages.

"You're going to see the biggest party on Earth," said hip-hop artist Pharrell, who was joined onstage by actress Cameron Diaz and a member of Latin act Mana.

The majors partners of the event are Al Gore, MSN, Control Room, Kevin Wall, the Alliance for Climate Protection. More info can be found at www.liveearth.msn.com.