In response, Snow...
Firstly: Anyone can be a star. If you're willing to sleep around. Or have enough $$$
Secondly: I can promise you that 95% of all recording artists use Autotuner on their albums. Yes, even the talented singers do. Jason Mraz, Carrie Underwood, Norah Jones, etc. etc. It's a standard step in today's post production of professional albums. The use of it is much more subtle on other recordings, which is why you've never noticed it.
The music producers of GLEE, for whatever reason, have chosen to approach the recordings in this manner - so it sticks out like a thorn. They're not trying to hide it, clearly. It's a choice and they're sticking to it. Their current use of it is not actually necessary. There are other methods of achieving this same goal. So... take it for what it's worth. I suppose.
When I think about you, I touch myself.