Helppp me, urgent...!!!

Hi tomorrow i have a semi final for singing contest in my college. And nowwww i am totally freakout.. I really scared if tomorrow i cant handle my nervous and start to ruin my performance. Btw i gonna sing i have nothng by whitney houston. Do u guys hve any tips or trick to overcome my nervous?? I'll really apprciate it... One more thing, sorry for my english.. Im a malaysian..!!