Active since the early '90s, Jamiroquai have amassed a steady stream of hits in their native U.K. and experienced chart success in just about every other area of the world, with an irresistible blend of house rhythms and '70s-era soul/funk (the latter, especially, leading early on to claims of Stevie Wonder imitations). The band has gone through several lineup changes during its career, but through it all, their leader has remained singer/songwriter Jason Kay (aka J.K.). Born on December 30, 1969, in Stretford, Manchester, Kay's mother, Karen, was a jazz singer who regularly p...