In this feature on Person of the Week, Diane Sawyer highlights the inspiring story of Regina Spektor's journey from poverty to musical success. Spektor, who couldn't afford a piano after emigrating to the U.S., practiced on windowsills until a chance encounter with a violinist on the subway led her to Sonia Vargas, a world-renowned pianist and professor. Vargas, despite knowing the family couldn't afford lessons, recognized Spektor's love for music and took her on as a student. Their partnership continues 21 years later, illustrating how a single dedicated teacher can profoundly impact a student's life and set them on the path to success.