If in a dream you hear the song, then now that period when you can quietly indulge in pleasures which are given you by life. If you sing, then you should be more careful in manifestation of the emotions as someone's envy can sadden your happiness. To hear sad songs in a dream means that you are expected by the adverse turn. If you find the heard songs indecent, then it can mean that you will spend the forces on trifles.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.