Every once in a while someone comes up with something and just KNOCKS it out of the ball park. Smule makes iPhone Apps, T-Pain in a Rapper who has popularized the Auto Tune plug in for ProTools. You put the two together and look at how much fun these people are having... this App Will do VERY WELL... (Although I'm really afraid to see what an App called "I Am Spenser Pratt" will be like. This begins the era of Celebrity Endorsed Applications.
By the way if you don't know who T-Pain is, you can run along and read something else...