Need help with a live Autotune system for halloween

So I don't know how many of you have seen this before, but this is Jimmy Fallon at the emmy's making fun of Kanye and autotune, itself.

With this halloween right around the corner, I was thinking of dressing up as the "next big pop star" and mocking the pop scene look of the new artists. As well, I want to have a live autotune on my voice for everything I do throughout that day. Does anyone know of a standalone system that can do this without playback? It needs to be done immediately on my voice.

Any help or pointings in the right direction would be appreciated!

omg great idea. I know ellen did it... And the iphone has an app for it... But i assume it would require a mic speaker, no talent and autotune

Iphone is the only think i can think of

Well, the beautiful thing is is that I'm an electrical engineer. I can make this work. I just need a system that can do the autotuning live. My bro has an iphone touch... so I might try and use that. Other than that, i was hoping maybe someone tried to make a portable autotune device that I can wire up some makeshift speakers to... and a bluetooth headset :)

Autotune as a VST insert on a DAW works live,but you need a computer,and all that stuff,the iphone looks like an easier solution