When you are singing a song in quick play mode or story mode if you hit the exact pitches there will be a number at the bottom left of the screen that says *2, *3, *4, and so on. Then at the far left of the bottom of the screen there will be a number such as 2500 or 5000, etc. if you can hit the exact pitches for at least two minutes, if you have a times(whatever number there is after the times sign).

Example: If your score on the bottom left hand of the screen is 5000 and you have a *4 it would times 5000 by 4, which is 20000. Then 20000 will be added to your score at the top right hand corner of the screen.