Former Led Zepplin star Robert Plant has signed on to headline the Romanian leg of July's Live Earth supergig.

Madonna, the Red Hot Chili Peppers and Razorlight are among the acts taking to the stage for a star-studded concert at the new Wembley Stadium to highlight the threat of climate change, it was announced today.

Former Pink Floyd star Roger Waters has dismissed speculation the rock supergroup will reform for former US Vice President Al Gore's upcoming Live Earth concert, insisting his ex-bandmates are not interested.

Star-studded concerts will be held in London and six other cities around the world on July 7 to highlight the threat of climate change, former US vice president Al Gore announced today.