Earworm, LOL. I used to drive a coworker crazy by calling and singing the Almond Joy jingle and then hang up. They would be stuck with it for the day....heh heh
I googled this up, but it says to name the song if you want to get rid of it....
The Germans use the word Ohrwurm (rhymes with "door worm," where the "w" is pronounced like a "v") to denote these cognitively infectious musical agents. Whenever somebody complains to you that he just can't keep the latest pop tune from running through his head, tell him he can dispel it by calling it by name and by thinking about the original German meaning, which captures some of the mnemonicalli parasitical connotations of the word, for Ohrwurm literally means "ear worm" and is also used to refer to a kind of worm that can crawl into the ear.
Howard Rheingold, "Untranslatable words," The Whole Earth Review, December 22, 1987
The shrink tells him that for some reason that has long since been forgotten, such dreadful, memory-saturating tunes are called "Pepsis."
Ear worms? Chekov wouldn't enjoy the memory. :-)