You are all so bias with these definitions.
Auto-Tune is a proprietary audio processor created by Antares Audio Technologies. Auto-Tune uses a phase vocoder to correct pitch in vocal and instrumental performances. It is used to disguise off-key inaccuracies and mistakes, and has allowed singers to perform apparently perfectly tuned vocal tracks without needing to sing in tune.
Almost every artist you've listened to uses this.
Practically every artist you like uses this.
But of course, most stupid people only point out auto-tuning as a negative thing for singers they dislike, whilst ignoring that the singers they like are equally as auto-tuned.
Person 1: Hey, did you hear that new Ke$ha song?
Person 2: Nah man shes autotuned leik fuk
*Person 2 later listens to equally autotuned singer but doesn't complain about it*