My maternal grandma would sometimes sing Mairzy Doats, a song whose lyrics at first seem meaningless. But if you listen closely and sing them slowly, this 1943 song all makes sense. It begins:

Mairzy doats and dozy doats and liddle lamzy divey.
A kiddley divey too, wouldn’t you?

Bonus: I even found a clip from The Lawrence Welk Show, a program for which I’ve seen more episodes than I care to admit.