songs freezing on iPhone

This has been an ongoing issue and tomorrow I'm taking my iPhone5C to the apple store near my house to see what is going on. When I'm listening to my iTunes songs on my phone, and say I want to skip a song, the song freezes for a few seconds then finally skips to the song. It shouldn't be freezing or hesitating. I would think once you press a certain song you want to hear, that right away it should go to that song. It's probably easier to watch me do it or have me do a video so that you can see.