Persistent earworm alert CLXI

Logically, you'd think that most earworms would be songs you really like or can't stand.  It always puzzles me when a song I haven't heard anywhere lately comes to mind, and it's a song to which I'm completely indifferent.  For some reason, my mind keeps looping through the intro of "Key Largo" by Bertie Higgins today.  Why is it standing out so prominently to me today when I have no strong feelings either way about the song, and I rarely think of it otherwise?