Idk about Selena Gomez, but Miley Cyrus wears alot of American Apparel. For more detailed info, go to and they helped me alot!
Forever 21 is really good and cheap too, so you wouldn't have to worry about over spending while you're still trying out your style. If you've got a higher budget, topshop is good and so is anthropoligie.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.