There's an argument to be made that "A Hard Day's Night" is the most influential movie of the past 50 years. Richard Lester's use of quick cutting around Beatles' tunes helped pioneer the music video aesthetic, which reshaped popular moviemaking through the '80s and '90s and into the new millennium. In addition, the film's crafting of fictional character iconography centered around the year John, Paul, George and Ringo popularized the conventions of the documentary and fed into celebrity obsessed reality TV for decades to come. Oh, and "A Hard Day's Night" is also just a ridiculously fun movie, full of great songs, loopy comedy and unforced wackiness.