Hayley Westerna, New Zealand's 17-year-old singing sensation and the country's best-selling artist, thrills audiences with her American television debut recorded live in her home country for Great Performances. Westerna sings her hits "Amazing Grace" and "Pokarekare Ana" (from her double-platinum album "Pure") with her band and the Wellington Sinfonia. "Pure" boasted the biggest-selling classical album debut in UK history.