I am a retired choral director of 33 years and have performed the national anthem at about 200 basketball games at Lake Central for over 20 years, sang at the Railcats game, and sang it at many other civic functions. The anthem is the important thing, not your celebrity stylings.
Sing it with respect and pride and make the words audible. Yes, the range is tough, but it's not impossible. The original key is not sacred. Sing the anthem unaccompanied but lower the key to make it comfortable for you. The anthem should be the star, not you.
I always instructed my students to sing it the way it is expected — with pride and reverence to respect the flag. This is how it should always be done. I truly love this country and all the anthem and flag represent. Let's have an end to all the atrocious celebrity butchering of the anthem.
Michael Lewis, Munster