Horror hostess character actress Elvira, real name Cassandra Peterson, recently went viral for saying at a a Knotts Berry Farm event that one of her worst celebrity encounters occurred when Grande brought a large group of friends and family to an Elvira performance and then refused to take a photo with Peterson.

Ariana Grande has apologised to the actress who plays horror icon Elvira after she accused the singer of ignoring her during a meet-and-greet. Actress Cassandra Peterson, who's best known for her Mistress of the Dark alter-ego, said Ariana Grande had requested tickets for herself and family members to one of her stage shows.

Ariana Grande is explaining how she remembers an encounter with Elvira after the Mistress of the Dark called out the pop star.