How to dress like a "scene" girl?

first of all i am not a poser lol. I am not "scene" either. I do have a party to go to. and there are going to be so many "scene" people. i usually do not use labels. but i guess i could be called preppy? i used to think preppy was rich but i guess not whatever. anyways i have to look scene. i know i have to tease my hair and wear bright makeup and all but i don't know what to do with clothing. i have rocawear jeans that are white wash with yellow strips. some orange, pink and blue (hot mess!) i have no idea what shirt to wear :( i have a cut off pink shirt like this a href="http://www.google.com/imgres?imgurl=http://www.supre.com.au/files/product/images/17553/purple-y-crop-top.jpg&imgrefurl=http://www.supre.com.au/OVERSIZED-CROPPED-T-SHIRT.aspx%3Fp17553&usg=__7F01eVXnzKe__fkCs4kPcgZ2tmg=&h=1110&w=870&sz=75&hl=en&start=51&um=1&itbs=1&tbnid=UZ02E4O5a5aOoM:&tbnh=150&tbnw=118&prev=/images%3Fq%3Dcropped%2Bshirts%26start%3D40%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US:official%26ndsp%3D20%26tbs%3Disch:1" rel="nofollow"http://www.google.com/imgres?imgurl=http…/a