Need help with halloween costume?

Ok, so ,my mom won’t let me buy anything new for Halloween. So I have to come up with something to wear with my own clothes. I don’t have very many choices – I only have like 3 dresses which I can wear and if I don’t wear a dress, I have to wear uggs. I’m 13 btw and I’m a girl. Please nothing gory or slutty. I was thinking about wearing a yellow shirt with jeans and uggs, and taping the Chiquita banana logo to my shirt ahah. I was also thinking about wearing a silver shirt and saying I was… idkk lol. If you can’t think of a costume idea, help me figure out what to say I am with the silver shirt thing lmao.