store music

What in the world is up with CVS's choice of music?
The last few times I've been in there, I've been put quickly in a depressed mood from the horrible music....
songs that I've never heard before. songs that I can't imagine anyone thinking "this is a good song"
I can't help but wonder if there's some specific purpose for playing such poor music.
does it cost them extra to play quality music?
can anyone enlighten me?