Ever been in a retail store? Have you ever noticed the music that plays there, and been even briefly annoyed by it? Imagine that five days a week, and now imagine that the song that annoyed you plays once every four hours or less.
Anyone who has worked in a retail environment for even a short while quickly grows to despise the music that plays in this environment. One of the biggest problems is working long shifts and listening to music that plays in short loops (1-2 hour long CDs) or even some songs that play once or more an hour.
This is a valid form of torture known as "music torture" and it is most prevalent in the holidays.
Working retail is bad enough as it is; don't make it worse by allowing this to continue.