Salaam Alaykum, Why not try and engage with her as to the content of the music, what type of music is it, what message is it portraying, how does it make her feel? Does she feel it "speaks" to her, if this is the case, then maybe you can speak to her about these issues that she might have as any teenager would have and what this music gives to her. If you simply try and ban her, or shut it off, we all know it won't work, maybe she needs an outlet for certain emotions she is going through, and when you find out what those emotions are you could re-direct her to other options.. Wasalaam