It's a big musical event when Joe and Blue have the Bluestock concert in the Blue's Clues backyard. Famous artists are on hand, as are many old, familiar songs. We explore a variety of musical styles, from reggae to jazz. We also pay a visit to Blue's Room for a little Mozart, in the form of ""Twinkle Twinkle, Little Star."" There, we learn quite literally just what the little star is.