I watched an earlier Variety Performance from 1980. Also interesting. At the end with all the performers on stage, a special guest was announced.: James Cagney.
It may have been his last public appearance. Cagney was appearing in the film "Ragtime." He refused to fly. So he traveled to England by boat. Cagney was especially interested in saying hello to the elderly Lillian Gish and Pat O'Brain who were also on stage.
Thanks, @marylander1940