Debuting with a revved-up R&B sound in the early '60s, rock legends The Moody Blues made a name for themselves by combining a grand, symphonic sound with ambitious psychedelic flourishes. Their classic albums, like Days of Future Passed, helped define progressive rock, while their timeless pop hits established the group's mainstream success. After a short hiatus, they returned in the '80s with a New Wave and synth-pop-influenced sound, and continued to tour into the 2010s.