Room ideas of a 13 year old girly girl?

i am not 13 yet but i will be in october i have a what i consider a medium sized room i have a built in dresser that has a mirror on the wall and use the top of the dresser for my make up and all and my computer i also i have a closet and 2 windows my bed is an air mattress and i have a white table i use as a night stand. i have a beige carpet and wooden walls i cant paint my walls or put up wall paper i have globed lights on my wall and i also have this weird sitting thingy that i have stuffed animals and a throw blanket right now my them is dolphins but i kinda wanna change it to something more teenage girly girl ya know thanks for the answers in advance xoxo sj