If you have seen any Wes Anderson film, particularly The Darjeeling Limited, you have probably realized he likes to use his soundtrack to very heavy-handedly underscore every emotion he wants the audience to feel. Quite frequently, my reaction is "OKAY, WES, I GET IT."
I saw Fantastic Mr. Fox this evening. I wonder if Anderson has ever used any diegetic music. I doubt it. Nevertheless, it didn't bother me as much this time. Maybe because I love the Beach Boys. And "Heroes and Villains" is my favorite song.
Also, Mario Batali is one of the minor voices? Crazy.