Here's a mash-up of The Beatles done by Hank Handy. It's been around a while but I first discovered it yesterday and when I heard the first two measures, I broke out into a grin (when the dissonant opening chord from Hard Day's Night is dropped at the end of the organ riff from Let It Be). It's a stunning piece of work, mixing Beatles snippets from many phases of their amazing creative arc.
(The audio file is mirrored here from Random Think.) click the picture below to download.
Here's a link to a YouTube video of the same track but with visuals.