Ariana Grande apologized after Cassandra Peterson a.k.a Elvira, claimed she had a negative experience with the Wicked star years prior. Peterson, 73, named Grande, 31, as one of her worst celebrity interactions during a Q&A at Knott’s Scary Farm in Buena Park,

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,

Cassandra Peterson, a.k.a. Elvira, is making waves on social media after a video from a recent event went viral in which Peterson recounted that Ariana Grande once brought several family members and friends to an event and asked Peterson to take photos with everyone — but declined to take a picture with Peterson.