Way, way back when I was about 7 years old, I was mesmerized with a new arrangement of Count Basie’s music. Not done by the Count himself, but a group (that I learned much later on) was called Lambert, Henricks, & Ross (LHR). What they had done was overdub all the Basie Project’s music, recreating the concept of the big band sound using only their voices. By the time I knew the group’s name, the album had been redone- with Count Basie playing along. LHR was generally considered to be the most influential singing group in jazz history. (It was also one of the first integrated groups, to boot!)