RealDev

class myClass {
Song Over;
public static void Init(ContentManager Content) {
Over = Content.Load("It's all over");
}

public static void Play(Song name_song) {
MediaPlayer.Play(name_song);
}

public Song getSong() {
return Over; // or however you want to decide which song to get
}
}

// [in Game class]
myClass a = new myClass();

a.Init(content);
a.Play(a.getSong());