It is Mr. Blue Sky, by Electric Light Orchestra. Great song by the way. And it was at the ending of LAX. Oh and the Movie... it was confusing as hell, but it all made sense later on.

> What is the song from the trailer of Eternal sunshine of a spotless mind? It was also at the end of LAX on NBC on Monday night.
> It's not the Shining by Badly Drawn Boy but another film.