How dressy do people usually get for homecoming?

I know the length it at or above knee, but what about the dress and material? would something like this be too much? a href="http://www3.jcpenney.com/jcp/X6.aspx?DeptID=50455&CatID=51773&GrpTyp=PRD&ItemID=169f731&attrtype=&attrvalue=&CMID=50455|51280|51773&Fltr=&Srt=&QL=F&IND=4&cmVirtualCat=&CmCatId=50455|51280|51773.." rel="nofollow"http://www3.jcpenney.com/jcp/X6.aspx?Dep…/a I'd pair it up with silver sandals and some cool jewelery. I'd probably add a few curls to my hair, but I always do.