Ariana Grande has proven once again that she’s the queen of impressions. In a Vanity Fair video interview published Tuesday, the “Wicked” star, in conversation with co-star Bowen Yang, revealed she had to convince SNL head Lorne Michaels to let Yang take on his role as Pfannee in the blockbuster film. “I initially wasn’t going to be in ‘Wicked’ due to an SNL conflict. But you called this person to ask him to let me do it. Did he give you any pushback?” Yang asked as an image of Michaels appears