During the period stretching from the late '50s to the mid-'60s, the Caravans went unrivaled as the nation's most popular touring gospel group; acclaimed as one of the greatest female acts ever to arrive on the spiritual music front, their fluctuating roster was unparalleled as a launching pad for future superstars -- Shirley Caesar, Inez Andrews, Bessie Griffin and James Cleveland were just a few of the ensemble's alumni who later went on to solo fame. The Caravans were formed in Chicago in 1952 by contralto Albertina Walker and other onetime members of the Robert Anderson Si...