I play piano. I haven't played infront of a large audience though since the talent show in high school. That wasn't really scary, because the first time I wasn't on stage, I was infront of the stage, and I couldn't see the audience because of all the bright lights on me. Plus, my desire to entertain took over, and everthing was fine. Even the second time, when I was on stage, that went really well too. The more you play, the better you perform, and the less frightened you are of performing infront of a large audience.
Ian