At least half the girls I know think they are ugly. And at least half the ugly ones are wrong. But why do they believe this? It probably doesn't help that every single day of their lives they are bombarded with images of photoshopped celebrities. Celebrities that they are constantly being pushed to emulate.
But no matter how hard they try, they can never really look like them. And the main reason is because the celebrities don't even look like the celebrities.
See what good makeup, good lighting, and really good photoshopping can do: