flipping the lip gives it another syllable and makes it sound twice as fast?

Carl Grayson..thanks for that correction! I didn't know which one it was.

It looks like there are quite a few recordings of the Boswell Sisters here:
http://www.archive.org/search.php?query=Boswell%20Sisters

Fanny Brice:
http://www.archive.org/search.php?query=Fanny%20Brice

(Phil..maybe you could stand on BillD's head instead--the two of you would combine to make a fine earwiggling duo?)