Hundreds of choir students were staying at the same hotel in Kentucky for a convention, and they all came out on their balconies and sang the national anthem at the same time. It was one of those hotels where all the balconies face inward, and the whole building is hollow, so the sound was huge. The guy who filmed it said the students were competing in the Kentucky State Choir Finals, but media reports are saying that it was the Kentucky All-State Choir, singing for the annual meeting of the Kentucky Music Educators Association.