LooseCannon said:It tells its story through song. I don't think that you can be any more musical than that.
Yes, but in traditional musicals the songs are written for the musical - while the Blues Brothers used old songs.
It's a musical like the Billy Joel musical: the songs already existed, and a story was written around them. Although the Blues Brothers did it well, and I can't imagine Billy Joel being anywhere near as good.
So it's a question of terminology, perhaps - I just define 'musical' more stringently than you do.