The last 4 look fake too me, excellent photoshop on munn herself but the background gives it away. The lighting on her does not match the lighting in the background. Plus no reflection or shadows from munn in number 5.
I think they're all real, captions and all. The captions come from the program Skitch and it's for OS X. And since Duff found a picture on her Twitter using the captions, it's basically confirmed that she has it.
I also think they're real because (this might sound harsh), but I don't think anyone cares enough to take the time and fake these pictures of Olivia (outside of her fans on this site, but most of us wouldn't even bother faking pictures). She hasn't done a lot lately, and it just seems like a ton of effort for a D-list celebrity.
That's not a diss, I love me some Olivia Munn, but we have to be realistic.
Haven't heard much about her recently. I wouldn't be surprised if she released these. As for the captions, I think they are legit. She says some pretty wild stuff on record. Chris Pine was probably into some rough play and she was just keeping his interest peaked. If she would't do those things, he could find some other hottie that would.
_________________________ You must drive the Shadow King back into the astral plane before it reseals itself...reseals itself...reseals itself.