Have you ever been haunted by a tune that you just can't place?
I have. There was one that I could pick out on the piano, and run through my head, and whistle (badly), but I could never identify it. Friends I asked couldn't place it, either, when I played it for them. They found it familiar, too.
I was beginning to think I'd come up with something on my own.
But, no. The mystery's solved. It was a slightly modified version of The Seekers' "A World of Our Own", dating back nearly fifty years. It was hardly a flash in the pan - it received a lot of radio airplay through the early 70s.
'My' version is slightly different - it preserves the melodic structure but changes just enough to make the tune 'familiar but I can't place it'.
So - mystery solved.
Now for another one - what I suspect was a jingle for an ad campaign, though I could have sworn it was a song from the early 70s. It included the lyrics:
Green lights and blue skies,
and miles of open road