Here's a tutorial:
http://audio.tutsplus.com...ain-cher-or-daft-punk/ The thing that the tutorial doesn't emphasize is that you have to
sing out of tune, and
it's even better if you sing, out of tune, in a whole different key so that the tuning software really has to work to move the vocals to the intended key and tuning.
You can transpose a beat track down temporarily and sing badly to that. Then, when you restore the beat track and tune the vocal to the intended key you end up with lots of distinct artifacts.
The tutorial also explains how you can use post EQ and Saturation and other common effects to enhance the overall effect.
Good Luck.
Have fun.
best regards,
mike
edit spelling