The Manhattans
The Manhattans were one of those classic R&B vocal groups who manage to achieve incredible career longevity by adapting their style to fit changing times. Formed in the '60s as a doo wop-influenced R&B quintet, the Manhattans reinvented themselves as sweet smooth soul balladeers during the '70s. In doing so, they somehow overcame the death of lead singer George Smith, and with new frontman Gerald Alston became more popular than they'd ever been, landing an across-the-board number one hit in 1976 with "Kiss and Say Goodbye." Under the leadership of Winfred "Blue" Lovett (who also composed some of the group's biggest hits), the Manhattans survived as a viable chart act well into the '80s, over two decades after their formation.