The Chemical Brothers set off the big-beat explosion by mashing up hip-hop breaks, techno synths and punk attitude on stadium-shaking tracks that thrilled ravers and rockers alike. The audacious swagger of songs like "Block Rockin' Beats" helped them break electronic music to America, but they didn't stop there. The duo have continued to surprise at every turn: working with Q-Tip, scoring films and fleshing out the psychedelic undercurrents that give their music its wide-eyed, '60s-influenced feel.