Amazing footage has emerged of a 9-year-old pianist wowing bystanders in London's Canary Wharf as she performed Mozart's Piano Sonata No. 11.<br /><br />The video, captured earlier this month at the Crossrail Place Roof Garden, shows her using a 'play me' public piano for the performance.<br /><br />The young pianist has been named as 9-year-old Asta Dora Finnsdottir from Iceland, who was visiting with her family.