La Dolce Vita is also a pretty close approximation of some forms of early celebrity shooting; it also touches deeply and painfully on the manipulation of news - see the visitation of the Madonna and the kids.
Blow Up? Well, I have to admit that I did see it a couple of times when it was originally released, and though first impressions, well, impressed, the more I saw it the less I fell for it, despite already working as a fashion photographer at that period. Or perhaps because of working in fashion at the time. But it was also a little bit inspirational for many of us. But then it was a movie, with a selling job to do.
There was also the Eyes of Laura Mars, with images reputedly by Helmut; there's a video of a fashion shoot sequence from the movie available in Youtube.
Rob C