What went down between Elvira and Ariana Grande? This slow-simmering beef came to light at a Knott's Scary Farm event that Peterson made an appearance at over the weekend of Oct.

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. She told a panel that she'd posed for photos and signed autographs for "all her friends and relatives" but that Ariana had refused to pose for a picture in return and left before the performance.

Ariana Grande is extending an olive branch to Elvira, a.k.a. Cassandra Peterson, after the Mistress of the Dark publicly recounted an unpleasant past encounter with the Wicked star. Commenting on Peterson's recent Instagram post featuring a viral video accusing Grande of rude behavior at an Elvira show,