I never really cared much for Liebovitz from when I wrote that Ansel Liebovitz parody a couple of years ago. I think she's a photographer who works by committee and one of her shoots has enough "assistants" as if she were shooting a movie.
A friend of mine was an assistant to Liebovitz. Based on what he told me you are being generous. One thing is for sure, If your subjects are the world's most famous people you are going to do AOK.
What I find interesting about this shot has little to do with the photograph. Frankly, it could have been shot by Yoko.