Cause it's one..

Two! Three months of nooooooooonn pooooooooooooooosting*
Oh, man am I a slacker! I haven't posted for three months! Oh, well, you will all finally get a challenge.
Challenge: Category Chaos.
Guess the movie, book, play, or comic book that this quote comes from.
"All the songs I have written go Oompah Oompah, but the mice only play TootleToot, Tootletoot.
Good luck!
*Sung to the tune of Take me out to the ball game.