Larry,
I like your use of 'AN oral tradition' implying that there can be more than one. I agree with you. Since the advent of writing any oral tradition has gradually altered over the centuries and the alteration has become much more accelerated over the last century or so. A purely oral tradition untainted by other traditions only exists in a few isolated places in the world. For instance, though we have very little record, we do know oral tradition was interacting with the scribal tradition long before the advent of print. Ask any Beowulf scholars.

However, various degrees of oral tradition are still possible and do happen even in the western world of the 21st century. Obviously it is on a completely different scale to a century ago. The simple descriptors of the 54 definition are entered above and if you can apply some of them to a particular 'pop' song then you might have a case.