My brother has had this argument with me for probably about 10 years concerning the rather great kids film Dot and the Kangaroo and the rather scary when you're a kid Bunyip Song in it. I hadn't seen the film or that part of the film for so long I couldn't remember much of it but he always claimed The Bunyip Song sounded just like Street Spirit by Radiohead but had no evidence to back it up. This morning he found and sent me a YouTube link and it appears he was pretty spot on. Even the person commenting on it says so. It sounds like Leonard Cohen singing Street Spirit and adding a proper chorus. Sorry if this is old news but it ends a rather epic family argument with us anyway.
The film's from 1977.