Curb Your Enthusiasm, S3E4: ‘Nanny From Hell’. Directed by Larry David. 2002.
A nanny that had worked at a Loony Tunes theme park is driven to psychosis when she hears the music that was forced on repeat at her job and she constantly repeats it through the episode. Sometimes it is externally heard, sometimes she begins to hum it out of nowhere (first clip of car with Larry).