So you MUST of heard of T-Pain by now the Singer/Producer! he's everywhere of course you have!
Anyway you can now Sing just like him with the cool auto-tune thing he uses! All you need is an iphone as its an App check out http://iamtpain.smule.com/ for more info! it looks cool! i imagine its popular as you can record your version of his songs & upload them to the site! check out some videos of it in action!