Well, it better be based on looks only. Because if this is about on screen performances, she isn't even close. I don't think she does it with men. And there are far better (Jenna Jameson for one) then her in lesbian scenes - imo.
All four our extremely attractive at their best - imo. But because the average porn/model fan seems almost obsessed with 'natural' breasts, I can see why she will win easily.
I wonder what the vote total would be if she looked exactly the same but revealed that she has breast implants (obviously a great boob job if that were true)?