Shania Twain sits down with Dermot O'Leary ahead of her Glastonbury debut, looking back at the joyful highs and emotional lows of a life and career full of loss and challenges but defined by recovery and triumph. For more than 30 years, Shania has enchanted music fans in ever increasing circles — first country fans, then pop fans, then taking her music to the world. Shania has always remained an optimistic trailblazer, opening doors and leaving them open for artists to follow after.