Dame Kiri Te Kanawa takes a personal journey exploring the physical and artistic demands of being an international soprano in the 21st century. Along with fellow sopranos including Renee Fleming, Diana Damrau and Anna Netrebko, she explains the qualities that separate the great from the merely good, and shares some of her favourite performances from sopranos including Dame Nellie Melba, Maria Callas, Elisabeth Schwarzkopf, Kirsten Flagstad, Leontyne Price and Dame Joan Sutherland.