Kiernan Shipka Explains Sabrina's Confusing 'Riverdale' Crossover! (Exclusive)

Sabrina Spellman is back, but does this Rivervale cameo really count as our official 'Riverdale' crossover? Kiernan Shipka is dishing everything you want to know to ET! Plus, the former 'Chilling Adventures of Sabrina' star is opening up about that Netflix series finale and what she would like to see from Sabrina's next appearance on 'Riverdale.' (Spoiler alert: Calling all Barchie and Varchie fans, you might not like Kiernan's answer!)