Moon River Andy Williams
Film scores (as opposed to "song soundtracks") tend to get a bad rap, and the reasons baffle me a bit. To each his or her own, I suppose, but film scoring is an art unto itself, and I really appreciate the composers who can write one that not only supports the movie, but stands on its own away from the film.
The score for "Bee Movie" does just that. As Mark and Glenn noted, it's a worthy addition to anyone's film score collection, and it's a big feather in Rupert Gregson-Williams' hat.
If you're not into film scores and just want the songs, you can find "Sugar Sugar" at Amazon's MP3 store or iTunes for a buck. And if you want "Here Comes the Sun," do yourself a favor: forget Crow's lackluster cover and get the original. You'll have to buy a CD ("Abbey Road" or "1") but not only will you get a much better performance of the song, you'll get a lot of other great music along with it.