Sort of Fellini's, but a very personal delirium by Fosse. Of course you have decadent man, full of sex and dream fantasies (remembering 8 1/2), but all that gags and jokes in that movie that he is trying to assemble (came from Leny), the dancing and singing (came from Cabaret). Unfortunately, Fosse made too it bureslec and the film can't breathe (rehearsal, family, hospital, film, dream).
Smart, sexy, dark and dangerous. I saw this movie in college when I was in the film club. We showed it twice Saturday and Sunday and it sold out all four times. One of the guys in my dorm saw all 4 showings. It has an amazing set of performances. Roy had to audition, but he had done singing and dancing earlier in his career. Easily his finest performance. He was Broadway trained, BTW.
I've seen a lot of movies lately that tackle the topic of the drive that comes with the want to create art and the issues that arrive and ensnare the artist on his quest for that creation, or performance. The others didn't get as meta about it as this one does. Stepping out of itself in more than one way, it also immerses itself in the world of performance art, and performance in it's own right, just as much.