Cameron Diaz and Al Gore are hookin' up -- to promote global warming awareness, that is. Cam and Pharrell were on hand at a press conference on Thursday in L.A. to announce Save Our Selves -- The Campaign for a Climate in Crisis, People reports.

The focal point of the movement is Live Earth, a 24-hour concert that will take place on seven continents on July 7. Among the over 100 scheduled performers are Pharrell, John Legend, Black Eyed Peas, Fall Out Boy and Kelly Clarkson. So far, the concert will take place in Shanghai, China; Johannesburg, South Africa; Sydney, Australia; London, England; and cities to be announced in Japan, Brazil and the U.S.A. "On July 7, you're going to see the biggest party on earth," Pharrell said.

Who knew Skateboard P had a social conscience?!