The finale concert of the YouTube Symphony Orchestra on 20 March clocked up 33m views on the video-sharing website. The event at Sydney Opera House drew more than three times the audience for U2's YouTube concert. There were 11.1m live streams of the orchestra's performance, which featured music by composers including Bach, Britten, Ginastera, Nigel Westlake and Mason Bates. The orchestra comprised 101 musicians from 33 countries, ranging in age from 14 to 49.