The prettiest of them, says designer Nicole Miller, are "delicate and refined. Think capellini." Yet even when they're barely there, spaghetti straps—those wisps that keep slip dresses from slipping—can give a girl peace of mind. "It's a way of looking bare but feeling secure at the same time," says Miller, who dressed Angela Bassett in a satin spaghetti-strap gown for this year's Cannes Film Festival. What's more, says Tori Spelling, "they accentuate the shoulders and show off the collarbone." And more, if you're so inclined. Sarah Jessica Parker says she keeps her strappy numbers tight, "so I don't have to wear a bra." Which may mean that celebs like Demi Moore, Ashley Judd and Toni Braxton aren't getting strung out just to play it safe. "Spaghetti straps are uninhibited," says L.A. stylist Jessica Paster. "They're hot."