Used to be that prom was a night of joy. Of hope. Of handsome boys and simple dresses. But now that you’re all grown-up and navigating the murky waters of black-tie, questions swirl around your pretty head. Marc? Ralph? Calvin?

No, not dates, silly. Designers.

But forget Marc for a second. Get in touch with your trusting inner fashion adolescent — and with stylist Dava Muramatsu. She’s best known as owner of chic Newbury Street boutique Matsu. But nowadays, she’s also focusing her keen eye and fashion prowess on the end product: you.

She’ll size up anything you show her — a dress, shoes, jewelry — and style it in a way that can only be called art. If your outfit is lacking the perfect sequined bolero or citrine-studded leather choker, she’ll search high and low until your black-tie get-up is red-carpet ready.

At that point you’ll have but one other important decision: Jared, Billy, or Zac?

No, not designers, silly. Dates.

Dava Muramatsu, Matsu, 259 Newbury Street, between Fairfield and Gloucester Streets, Back Bay (617-266-9707) or matsuboston.com.