According to Reddit, Face Melody will take a detailed look at your face and then tell you which song fits your appearance. It'll also tell you what your "smile level" is and analyze different aspects of your face.
Unfortunately, some pieces of the site aren't written in English, but you should be able to easily navigate the pages as long as you use your common sense. All you really have to do is upload a picture of yourself looking directly at the camera. Then you can sit back and enjoy the music.
Did you try this website out? How did you like it?