Yeah, this song:

http://www.youtube.com/watch?v=5lYpztftDLM

After finally landing a copy of Sony's Asian version of the Kung Fu Hustle Soundtrack, I now have the song I've wished for since discovering its bitter absence from the the U.S. Varèse Sarabande release several years ago.  "Yao Wei Ni Huo Yu Tian", more commonly known as the mute, lollipop girl's theme, is featured in both instrumental and vocal flavors, with the latter sung by Ms. Lollipop Huang Shengyi herself.  I've taken the liberty of combining both tracks into one suite:

Yao Wei Ni Huo Yu Tian:
http://www.mediafire.com/?lvlpcrir24hcnmx

Such a pretty piece.  The film version appears to have either up-pitched the song, or Shengyi herself is singing in a higher pitch.