The Kentucky All-State Choir held an impromptu performance of the national anthem at a Louisville, Ky., hotel and an observer's video of the chill-inducing song quickly went viral.

There's some debate online as to whether this video is from last year or if it was in honor of the start of the Winter Olympics this weekend. Either way, their rendition is so good it doesn't really matter the motivation.

Related on MNN: 10 inspiring renditions of the national anthem