What is good way to not be so nervous???

Question:

What is good way to not be so nervous???

Hi i am a girl whos 12 and i play Cello and on Christmas Eve i have to play with 2 other girls a peice in front of the whole church of people and it will be so full!! Ive played long time but i never play in front of so many before and im already kind of nervous about it Im so worried ill make huge mistake in front of everyone. I've prayed and asked my mom about it and she said to try breatheing really deep but does anyone else know good way to not be nervous in front of others???

Best Answer - Chosen by Asker: just take a deep breath and dont think about it. Just do what you need to do. Just pretend there's no one looking