How do I set Audacity to make my voice sound like T-Pain?

I don't have any software downloaded yet, except for Audacity.



I want this because I am making a MixTape and this sound

would be perfect for some songs.How do I set Audacity to make my voice sound like T-Pain?
You can get some good sound effects here%26gt;

http://www.ilovewavs.com/