I need help...please?

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

Tell yourself आप 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 गाना think that your a तारा, स्टार and the ppl in the crowd is your प्रशंसकों :P

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