I need help...please?

Just take deep breaths and remind yourself wewe can do it. Try not to think about the people watching, think about the emotion wewe put into the song :)

Tell yourself wewe can do this. and picture everyone in there underwear :3

well my mind is very very active i can imagine a robot out side the school shooting at something
.....thats just me but the best way is to think about the future just think about when your imba think that your a nyota and the ppl in the crowd is your mashabiki :P

Have wewe ever been on stage performing au something like that?
If wewe haven't, let me tell wewe something, it's not frightening at all, because the light won't let wewe see the people, so it's like wewe and your friend are there alone and that's a plus if you're afraid/nervous to go on stage.
Another thing wewe could do is:
-Imagine you're in your room au some other place where wewe feel calm.
-When wewe enter on stage never look at the audience and when wewe start singing, start with your eyes closed and, slowly, start opening them.
-Sing turned to one your Marafiki (e.g: If you're 4, wewe sing turned to friend 1 and Marafiki 2 and 3 sing turned one to another)
-If wewe can, ask the guy who's responsible for the lights to turn off the lights for the audience au something like that.

Oh my goodness. I remember when I used to have stage fright. Well here's what I can tell you.
I suggest wewe bring the lyrics up on stage with you. Then don't look at the people out there in the crowd and just read the words.
If wewe can't do that picture everyone in their underware. That's the best I can tell u.
Good luck with the talent show.

The important thing is to have fun. If wewe enjoy that song and mentally at that moment live that song...it won't be like you're performing it. People will see it as real because wewe enjoy it. Same goes with anything!