Though the composer of countless great tunes for Motown,
or Chess, or whatever,
Mr. Hayes went on to his biggest fame
as the voice of Chef
on the greatest tv show ever,
South Park.
However,
Isaac re-discovered the sand he'd been hiding in his vagina
after 30 long years,
via something called "Sciontelechy" (reference needed).
He soon quit South Park,
and no one gave a shit about him
until he died.
May he be at rest in the space volcanoes
that await him in the Crab Nebula's Sandy Vagina sector.