I think that is a bluegrass song - if it is not, it should be. Meanwhile, David Nelson's fashion sense (or lack thereof) continues to reach far flung and unusual places - two pictures recently grabbed from the internet prove me right.
First of all, here is a photo of poet Jack Hirschman sporting a lovely Nelson-style headband. Note the more tastefully attired Lawrence Ferlinghetti, resplendent in a politically correct bicycle helmet:
And here we have QVC Fashion mogul Jeanne Bice also wearing a headband (but to be fair, my sister has always said that Jeanne reminded her of David Nelson):