4:35 Green Day - 21st Century Breakdown [Official Music Video] 3:07 Bad Religion - \"21st Century (Digital Boy)\" 7:23 King Crimson - 21st Century Schizoid Man (Including \"Mirrors\") 3:28 [BTS - 21st Century Girls] Comeback Stage | M COUNTDOWN 161013 EP.496 2:47 Huddy - 21st Century Vampire (Official Music Video)