Elvira Does Halloween PSA To Urge Indoor Parties: Elvira, Mistress of the Dark, says “it would suck” if coronavirus canceled Halloween this year. Actress Cassandra Peterson has revived her spooky 80s hostess for a new PSA urging folks to party inside this Halloween. Trick-or-treating may be off limits this year, but Elvira points out you can still enjoy “costumes candy and celebration” in isolation! She’s delivered the PSA with a spooky tune, posted to her YouTube channel HERE. Check it out to the right.