I would definately say it's all good. I'm usually, depending on the music stylings, wild on stage. I find that i can still get the notes that i need to out, and maybe every now and then, i may miss a note, but it's alright because no one knows that it happened nor do they care. People usually go to Concerts to see a show and not to hear the music necessarily to it's perfection. So i say, let yourself go, have fun.