How can I overcome nervousness playing guitar infront of people?

OK, so basically, I'ma pretty good guitar player. I know chords, scales, riffs, arpeggios, etc. but I am nervous of playing guitar infront of people. I am on my church's youth worship team, and we practice once a week. I know the 3 songs(because they are mainly a few basic chords with a 76-78 monotone) well, but I am nervous about messing up infront of people because we are leading worship on November 21st. I am just nervous about messing up. I even got strap locks so I could save myself the embarresment of a slipping strat. How can I overcome this?