Annoy

snipped directly from the presurfer -

Do you know why you can't get that particular tune out of your head? It's because the many thousands of tunes most of us know, from arias to singles and jingles, are locked in a shifting pattern of neural circuits in a region just behind our foreheads.

This part of the brain - the rostromedial prefrontal cortex - has complex functions relating to the link between data and the emotions, and it may be the reason why melodies evoke memories.
Like this song for instance.