As the epitome of laid-back cool, the handsome, mellow-voiced crooner Dean Martin successfully redefined his image throughout his career with ever straying too far from his established persona as a good-natured, quick-witted and booze-loving regular guy. Though his onetime partner Jerry Lewis would later call him "the most underrated performer in the history of our business," Martin was embraced by both the audiences of his time as well as subsequent generations of fans who weren't yet born in his heyday....