You will sound so much better looking up and out instead of down at your music!
You will enunciate better when you are actually singing to somebody, rather than singing to your sheet music.
People like to see who's singing. Don't be a disembodied voice! Look out over the crowd, open your eyes and mouth expressively.
Have fun, feel the sentiments you are expressing so that your audience feels them too!
You are fabulous! This is not the time to be humble. Share your gift! Let it go!