Related Information for Singers Unlimited The Singers Unlimited was a four part jazz vocal goup formed in 1971 by Gene Puerling. Members of the group included Len Dresslar (better known as the Jolly Green Giant in General Mills commercials), Bonnie Herman, Don Shelton and Puerling himself.Gene Puerling and Don Shelton had originally formed part of the successful all-male vocal group, The Hi-Lo's, some years previously. The Singers Unlimited Group were originally formed to record for commercials in the USA, but as time.. read more