Eminem has told RapRadar that not only did he know about the Bruno stunt, he rehearsed it.
"I'm thrilled that we pulled this off better than we rehearsed it. It
had so many people going 'nuts' so to speak. Everyone was blowing me up about
Sacha called me when we were in Europe and he had an idea to do
something outrageous at the Movie Awards. I'm a big fan of his work so I agreed
to get involved with the gag.
After the ceremony I went back to my hotel and laughed uncontrollably
for about three hours, especially after I saw it on air."
Alright, pipe down... it wasn't that funny.