Snazzy clothes for my mom?

My mom wants to go shopping with me for something to wear to my wedding. Where should I take her?

Ideally, I'd like to keep it to a just a few areas rather than all over the universe, so I especially welcome ideas in The Slope, Boerum Hill/Carroll Gardens/Cobble Hill, SoHo/West Village. But if you know someplace awesome elsewhere, say so.

Very generally, my mom is short, curvy, mid-fifties, and more Eileen Fisher than Ann Taylor. And clothing-wise, my wedding is probably "cocktail attire" (or whatever is like 1 1/2 steps below black tie).

THANK YOU.