Song with only "Wa" "Wa" for lyric?


I heard a song at a restaurant that had only "Wa" "Wa" for lyrical content. If anyone can identify it I would appreciate it. God bless. I repeat, the ONLY lyrics in the song are "Wa" "Wa".
128x128wellfed
Rethinking it might be meredith monk from the LP 'book of days'. you can go to cdnow.com and take a listen to 'eva's song' under the cd 'book of days' if you really need to know. although that one's more of a na-na sound. but thats all there is. na-na-na (sorry, this is getting too weird - just go check it out if it's driving you as crazy as it's now driving me).
i hope you're happy, i'll be up all night!
:)
I suppose my guess of Charlie Brown's Teacher doing her rendition of "O' Tannenbaum", with Vince Guaraldi accompanying on keyboard, isn't right.
Just checked out the Meredith Monk/Book of Days/Eva's Song and this was not what I am looking for and I am sure it is not by Vince either. Thanks for the help though.