Is it possible to get earwormed with a fictional song? A song that exists only in a book? I think Ann Leckie may have managed this with:
My heart is a fish
Hiding in the water-grass
In the green, in the green
and particularly with:
It all goes around, the station goes around the moon, it all goes around…
… My mother said it all goes around, it all goes around, the ship goes around the station
Kathleen Jowitt 