Andrea Bocelli's mesmerising Music For Hope live concert from the deserted Duomo di Milano has broken world records. The opera singer's Easter Sunday's performance has become the biggest live-streamed classical music event of all time, with a combined 35 million people viewing the 30-minute concert. The historic event reached over 2.8 million peak concurrent viewers, making it one of the biggest musical live stream performances of all-time and the largest simultaneous audience for a classical live stream in YouTube history.