Huh? What is that phrase supposed to explain? It has nothing in common with anything of these lyrics.
Btw, I'm a native speaker of German, you don't need to link me a website teaching that language.
"der Musik" actually is no completely wrong. It can mean something like "the music's", but normally one would only use that as part of a sentence, and not just this 2-word-phrase, that's what I mean with it being wrong grammar.
You can have your time (I myself am not really interested in who's the musician of that song, it's not my taste at all, I just asked since it seems strange to me).
The title is wrong grammar - you sure that "Der Musik" is not the artist's name or something, La Cumparsita?