It has to be fake to some extent. I mean, They always have cameras waiting everywhere for them to enter places (like apartments, restaurants, etc) so you know they must like.. stop them, tell them to hang on, and then enter with a camera and film them coming inside. Not to mention all the editing that goes on!
And the only thing Lauren ever did that made me want to throttle her was turning down Paris. WHO DOES THAT?! And now that Jason guy and her aren't even together and he's acting generally like an ass around town. Very big dumb thing to do, but I suppose everyone does a few dumb things in life.