[header] How to have a perfect bedroom (teen girls ) [title] Paint your room or wallpaper it or use both if you want to and you are able. [step] Paint and wallpaper can really help you achieve your perfect room, however, it isn't necessary. If you're allowed to paint your room, choose a colour that you like and that reflects you. 
If you aren't allowed to paint/wallpaper your room, hang some fabric on the walls, or just put up some posters and pictures that you like. You could also buy removable wall stickers to help give your walls some interest.