Go to the music tab and press on my music. then you scroll down to where it says: my profile playlist, song activities and playlists. then in playlists, press on the playlist you want then it should come up in the box next to it. you then put your mouse on top of the song *dont click* then move it across to the far right hand side where there should be a small X in a box thingy. Click that and it gets rid of the song. (it comes up with a thing that says are you sure you want to delete 'song' and then you just press delete.)