The top singing programs are the ones that help you learn to sing in the fastest time and at the lowest cost.  You want to get a program that will allow you to see the singing lessons as well as hear them.  You also want to use a program that helps you practice the exact techniques that are being taught over and over.  Obviously practice makes perfect in this situation.If you get a program that contains a DVD, you will be able to watch and listen to the program as often as you want to.  Learning with repeated listening is the fastest way to learn.