What should I wear to an indoor concert?

What do people normally wear to an indoor pop/rock concert? I'm going to the Jason Mraz concert in at Radio City in NY tomorrow. I really didn't plan to wear anything extravagant, I have this sweater/tunic thing, and I was planning to wear shorts with tights underneath or leggings. I'm really going on comfort, but I don't know if that's okay enough to wear... and how should I do my hair/makeup? I have very curly, shoulder-length hair, and I don't have time to straighten it. Any suggestions??