Across the Universe. First off, the covers in this film are fantastic, but they do not, and will never hold a candle to the flame that is known as The Beatles.
That being said, I am a sucker for the highly stylized music video approach that most of the film falls under. It is a very unique presentation of the source material, and the story is entertaining, albeit predictable. My favorite song from the film? Probably the cover of Hey Jude, mostly for the impromptu garbage drum solo, but there are many standouts.
This movie just hits me in the right buttons and lifts me up when I am feeling down.