Lee Sallows writes:

Okay I'll have a look at your survey. Actually, my favourite number is Beethoven's Moonlight Sonata, but I think Ying Tong Yiddle I Po comes in a close second.

I believe the correct lyrics are Ying Toddle Iddle I Po. (Though I suppose there could be a Hasidic version "Ying Tong Yidl I Po".) Jim Propp