how do you sing so well

I sing well by using my diaphragm, by using the correct vowels, by practicing. (I now practice singing every day as long as I'm not about to lose my voice).

It really pays off too. So far since second grade I have been in school choir in Georgia (my old hometown), church choir in Georgia, Singing solos at church, talent show at my old school in Georgia, Kansas at my church, at my school in Kansas, solos at my church in Kansas, adult choir at my church in Kansas, league music festival in Kansas (when I was in middle school during 7th, 8th, 9th, and next year I will sing in 10th grade), school concerts in Kansas, Regional music festival in Kansas, State music festival here in Kansas, Tri-state in Oklahoma (we got ones for choir and ladies glee).