From the moment you step on stage until the moment you step off, you will hear the music that plays in your area on loop. I worked in the backlot area at Hollywood Studios, so one of my stores was Tatooine Traders at the end of the Star Tours attraction. I heard Star Wars music all day for several days at a time. I had dreams about Star Wars. I could quote every line from every song that played in the Muppets store after working there for several days.
But the best part is when you work a closing shift and you're cleaning up your store or cart after the park is completely empty and the music just continues on as if nothing has changed.