"The song itself has been... criticised for its use of Auto-Tune."

I've always wondered about this. How exactly, other than asking, do you know if an artist is using autotune? I understand that if you pitch shift to extremes it makes things sound very odd but for normal correction of off notes, can it be heard? Can anyone give me an example of a song where you can hear the signs?

The really obvious unhuman shifts in pitch of her voice to better match the songs beat, as well as the robotic sort of tone it gives. You get the impression from watching the video that she's pretty much talking the whole way through, and not singing. They use auto-tune to make it seem like she's singing and has great range.

Vocoder not autotune... and autotune is just 1 autopitching software