Singing tips for my audition?

hi i'm 15, , when in 7th grade 13 , did musical called suesical musical , nervous cause bring in 10 people in group hear sing. , on youtube , had no idea song wanted sing, sing fun , mom said sang , song came me. sang wanna know hannah montana , practiced hard , onstage , start singing it. soprano in choir. when singing warm ups on youtube, or on own. should check out ericareceneax amazing singing , lot of singing warm videos , question. go him everyday before sing since last year , says singing has improved. comments gets good. loves him . should check him out , time audition comes, prepared. luck, , hoped helped. :)

i have audition musical im worried singing. dont have, ever had, singing teacher. however, soprano in choir.

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