You can never really loose stage fright. When im playing live i tend to get really psyked up befor, and force my self on to the stage, 9/10 im comfortable straight away and can play. But as you've never played infront of an auidiance befor, i sugest you play infront of a few people, 20-30, if you can do that youl be fine. Also if your on a stage with lights on you, you wont be able to see much of anything beond the stage anyway.
Just remember to have fun with it.
And if it helps any, im playing aces high in the talent show at my school in 3 weeks, i have to learn the first solo befor that too.