Pitch correction is unable to change the timbre of a voice. If you can't easily recognize different people's (auto-tuned) voices, you would be in the vast minority of humans who lack this basic skill.
You can count me in that group, in this particular case, but maybe pitch correction is not the whole story.
Here's my point: I can identify a song as being by Dr Luke far more confidently and readily than I can identify the named artist, and I doubt I'm in such a tiny minority there.
