Besides that, I think Frank Sinatra is an accepted hymn in the Book of Concord.
Here's a "serious" question I actually have concerning Confessional Lutheranism. I don't follow that denomination, but I am a foreign....uh, no.... a former Catholic and understood the concept of not only Biblical Scripture, but also the RC Catechism and Tradition all of which pose as tenants of the Church. So, I understand the fullness one gains from Liturgy, stories, etc, but I don't really understand why CL even needs the Book of Concord? I admit I've never read it or studied it other than knowing that BoC relies heavily on exact interpretations of Biblical Scripture. But if you have the Bible, then why do you need the book. Thanks.