Some of these people, like Tyson and Ratner simply play themselves, other's don't. None of them, not one, has anything interesting to say or do. One of the most annoying things in the film is watching Tyson try to improvise his way around some dialogue, since he plays himself, without appearing like a complete asshole. Worse yet, he gets to play a gaybasher in the film. None of it, not a frame, means anything.
Nothing here is new.
The worse thing about the film is watching Robert Downey Jr. namby-pamby his way through playing yet another stereotypical flitty, fey, gay guy. It just means nothing to a middle aged white guy like myself. I don't think it will mean much to young people either. But you'd have to ask one of them. Maybe they get it.