Mall of Milennia is fashion heaven. For the young trendy set, there's:
Neiman Marcus (great sales, less expensive than you'd think, a great place for occasion/dance dresses)
Macy's (BIG store, merchandise overload, but you will find great buys)
For upscale looks, there are lots of designer shops.
For the college bound and those who dress like they are:
Forever 21 (cheap and trendy)
Abercrombie and Fitch (preppy)
News: there is a new MAC cosmetics store upstairs between Bloomies and Neimans.