No one is safe from Miranda Priestly's shade ... not even Anna Wintour . The Vogue boss graced the May cover in a joint shoot with Meryl Streep , who was fully in character as the iconic "The Devil Wears Prada" antagonist. In the issue's cover video, the magazine moguls can't quite place how they know each other ... despite both being famed fashionistas. They ride the elevator to the top as ABBA's "Dancing Queen" plays in the background -- a nod to Meryl's role in "Mamma Mia" -- while sizing