The act with the first arena-sized sound in the electronica movement, the Chemical Brothers united such varying influences as Public Enemy, Cabaret Voltaire, and My Bloody Valentine to create a dance-rock-rap fusion which rivaled the best old-school DJs on their own terms -- keeping a crowd of people on the floor by working through any number of groove-oriented styles featuring unmissable samples, from familiar guitar riffs to vocal tags to various sound effects. And when the duo (more