Oh crikey, I really suffer from this, don't I?
This morning, I was struck by how lucky I was with a tailwind and th changes of the traffic lights favouring my progress in most cases, so Kylie started off with 'I Should Be So Lucky'. In contrast to fboab's earworm, the fact that I know very few of the words made this particularly unpleasant. Fortunately, that morphed into 'Dreaming' by Blondie, which was better.
Then I hit the traffic, and a recurrent song reappeared: Little Boxes by Pete Seeger. It's actually about urban sprawl, but it applies to the heap of cars on the road too.
Little boxes made of ticky-tacky...there's a red one and a green one and a blue one and a yellow one. And they're all made out of ticky-tacky and they all look just the same