My fellow orgahs

i need advice. I've been singing in a band now for about 6 weeks and considering i've never sung this way before, and our drummer started learning a week before the band formed, i think we've gotten pretty good.

This is, we havn't played a show yet. Until now.

My first gig's on sunday and i'm absolutly terrified. Is there any advice anyone can offer me?

thanks alot