What's this very old song please?

It goes Na Na Na Na Na Na Na Na Na Na Na, it three groups of four. Then a guitar goes Diddly ong bong, three times, then it repeats the Na Na bit. And some of the words might be Bush or Mush or something like this, and a bit about hearing a name. The man who sings it is good looking but has on flairs so it's well old. Like 60s