Performing at the US concert

Despite releasing her debut album, touring extensively around the world and appearing on several TV shows, this Chinese-Irish-Scottish singer/songwriter's biggest public exposure came when her song "Black Horse and the Cherry Tree" was performed by Katharine McPhee on "American Idol." This will be remedied when she takes the stage at Live Earth.

More KT Tunstall on MSN Music

Watch the complete Live Earth US (NYC) concert now!