Uglies Theme

In my book, Uglies, the theme is very present. It is that looks shouldn't define you and everyone is uniquely beautiful in their own way. 

I know this because David, who Tally meets in The Smoke, is not a pretty. He was born in there. When he told Tally she was beautiful, at first she denied it, because she hadn't had the surgery yet. But, since she eventually feels confident in her looks, we can infer that the author wants us to be also.