Robin Roberts in “Unfinished Business”

Six years ago, a 12-year-old pop star with a Tennessee twang, exploded onto the music scene, taking the world by storm. Since then, Hannah Montana has dazzled us with her incredible talent, her infectious charm, and her unique style. But underneath all that amazing talent was a secret even more amazing: That famous blonde hair was really a wig, that hid a regular teenage girl. While Hannah was doing sold out tours and blockbuster movies, the girl under the wig was going to school, and trying to fit in like any other teenager. Well, days ago, that teenager stunned the world by revealing the truth behind the international phenomenon. I'm Robin Roberts, and today we sit down with Miley Stewart, the remarkable young woman who is -- or rather was -- Hannah Montana. As she, for the first time, shares her amazing journey.