They're not the Beatles, but they're also not not the Beatles. The 1978 Monty Python side-project All You Need is Cash was a mockumentary film (predating This Is Spinal Tap by six years) about a mop-topped band from Liverpool as it skyrocketed to stardom and then broke apart. Produced by Eric Idle and Saturday Night Live impresario Lorne Michaels, the made-for-TV movie brought together the best comedians Britain and America had to offer — Michael Palin, Gilda Radner, Bill Murray, Neil Innes — and even featured a cameo by an actual Beatle, George Harrison. Although the film was a ratings flop, the subsequent album release sold very well and even won a Grammy.