Beyond the Valley of the Dolls (1970, USA)
It would not be an exaggeration to call Beyond the Valley of the Dolls one of the strangest movies ever produced. Looking to cash in on Jacqueline Susann’s deliciously trashy novel (and subsequent trashy big studio film) the movie is by turns funny, amateurish, gross, distasteful, misogynistic, exploitative and brilliant.
There are so many back-stories and interesting behind the camera plot-lines that Russ Meyer himself would be hard pressed to invent similar tales. Distinguished film critic Roger Ebert helped write the screenplay, surprising because, while Ebert would praise [the] occasional exploitation film, he generally held a dim view of horror and slasher cinema.