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".
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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.