Designing my room like Hollister?

So, My room is really little but it's time for a change so I wanted to redo it like hollister. Mainly I need to know what colors to use because we are painting my walls. Since i'm a teen girl I <3 Hollister but i don't want my walls to be a dull brown. What other colors would look okay? & I don't have a lot of money to spend on hollister paintings to hang on my wall so is there a place to get them cheap? What all should I put in there? I don't need to buy new furniture , my dresser and desk and bookshelf are all just plain white. I do have a window so curtain colors? Bed colors? Pillow colors? Anything you have to say will help<3 Thanks.