Easy. Stephen Chow's Kung Fu Hustle.
It takes a cinephile from Hong Kong to make a crazy mashup of 30s gangster films, 40s musicals, Looney Tunes and Run-Run Shaw movies and actually make it work better than any of its source material.
Stephen Chow, you shine on, you crazy movie-loving diamond. Keep doing what you do. The movie world needs you.
I have an inappropriate crush on The Landlady.