I listen to music all day (and night) long.
I have made specific playlist according to what I feel like.
I have one for being happy, one for being in love, one for the break-ups and one for action games.
When I'm photoshopping I always have music playing, no matter what it is.
Most of the times I listen to my favs like 3dg,judas priest, skillet, bfmv, nightwish, maiden, iced earth, dio, planet of zeus, sonata arctica, sabaton, trivium and many many more bands.
It's must to have music playing, while photoshoppin' imo .
It helps your creativity as well. Many of my tags are music-inspired.