My iphone 5 froze and it's playing music?

I was listening to music on it and I went to go pause it but it was frozen. I was able to turn down the volume but I can't reset it because my power button doesn't work. Now the screen is black and the home button isn't waking it neither is plugging it into the computer. I click on "summary" and it says I have 19gb of "other". What the hell do I do?

It will stop playing music eventually.