A singer’s talent is complete when they can bring a crowded dive bar to a collective hush and also get one of the biggest audiences on the planet to a collective standing ovation. Stephanie Anne Johnson is that special singer. Stephanie can don a cowboy hat and sing over a slide as old timers weep. And they have wowed judges on the immensely popular NBC TV series, “The Voice,” showcasing their gifts. Their music, which is rooted in all that’s American, expresses the pain of the past, the roots of the down home and the hope that hard work will lead to proper reward.