We’ve been trying to figure out which came first, the Oak Ridge Boys singing Elvira or Cassandra Peterson performing the character, Elvira - Mistress of the Dark. Dallas Frazier and others were performing the song, Elvira, all the way from 1966 to 1979. The Oak Ridge Boys recorded their Elvira song in early 1981, which is also about the same time when Cassandra Peterson selected Elvira as the name for her character.