I can't get my skirt off! The zipper is stuck! Help?

I have this really frilly, tutu-like skirt on and it zipped up fine this morning but now, it won't unzip! I can slide it off either or make it go over my head. I'M STUCK IN IT! D: How do I get the zipper unstuck? I already checked to see if it was caught in something and it wasn't...