A very fine line divides you from the average movie star slash supermodel slash socialite.

That is to say, a lineup of very fine staffers working ’round the clock. If only you had Jen’s colorist or Nicole’s stylist, you, too, could be famous for looking perfect.

A stylist, you say? That you can have. Johanna Foster, a high-end retail veteran, knows what looks good and what looks good on you.

Many of her clients are regulars (who get duds brought to them in-home from the likes of Louis Boston), but plenty sign up for one-shot deals: a killer ensemble for their 30th birthday party, for example, or a see-you-in-hell outfit for the wedding where they know their ex will be.

Fear not: Foster takes into account your personal style — and budget — and never drags you into stores that don’t work for you. She can even help you pick out a sweet set of workout clothes.

For your next round with that celebrity trainer.

Johanna Foster (617-869-7769 or johannafoster.com).