adele addison (born july 24, 1925) is an american soprano. she was a figure in the classical music world during the 1950s and 1960s. she was an opera singer. however, she spent most of her career performing in recital and concert. a lot of her singing is from the baroque period. she is well known for performing the singing voice of bess (played by dorothy dandridge) in the movie "porgy and bess" (1959).