Eternal Sunshine of the Spotless Mind:

The song in the trailer is "Mr. Blue Sky" by ELO. Good stuff until about the half way point. Does sound very much like the Beatles (until about the half way point) which is frightening yet intriguing. I'd upload it so you could all listen to it but... Well, nevermind, I tried to upload it but it error'd, and also the song is only good for the first minute or so, nevermind.

Movie should be sweet, though.