Usually, what happens inside the Met Gala stays at the Met Gala. Thanks to Anna Wintour’s famously strict rules about photographs inside the event, the public doesn’t see much of what goes on at the actual party beyond the occasional bathroom selfie. But this year, a surprising amount of footage has emerged from inside the museum, and it all appears to revolve around a performance by Ariana Grande.
Photo: Kevin Mazur/MG24/Getty...