It is about a young woman who dreams to be an envy of others. She is starving herself or she may even have gone under knife as beauty is pain and there's beauty in everything. She may have even passed on to just wanting to look as same as those famous beauty models as 'she fades away' in the song. This is a really powerful song that represents many girls nowadays that do not realize that they are already perfect and unique just the way they are. It's telling you that you are just beautiful and you shouldn't change a thing inside out. The singer is trying to express to those girls that's hurting, let her be your mirror, to help you see a little bit clearer and to tell you how you are beautiful already. Don't let the current social standard of beauty ruin you.