That is such a beautiful story! For me it was much less romantic.
I was sitting in my room in my pajamas one night when my boyfriend and one of his brothers (the other sweetheart's blood brother) came and asked me to come out to the lobby. then I knew what they were up to. We went out and all of the brothers welcomed us into the circle and sang that very same song. It was such a wonderful moment, but not as wonderful as being proposed to at the same time!!