Gorillaz began as something of a lark for Damon Albarn, a way for the singer/songwriter to explore music his Brit-pop group Blur otherwise couldn't make. And yet, the "virtual band" he conceived with artist Jamie Hewlett in the twilight years of the 20th century turned into his main gig in the new millennium. Gorillaz's eponymous debut was an international hit right out of the gate in 2001, thanks in part to the moody, slinky smash single "Clint Eastwood." Its sunny counterpart, "Feel Good Inc.," was an even bigger hit in 2005, while its parent album, Demon Days, revealed how ...