Be still our beating hearts! Ari Dein is our favorite young designer. Her impeccable turns of hand-sewn ribbon are the opening strains of Gershwin, her hand-selected silk charmeuse silhouettes and drape echo the swell and hush of Olmstead, her pitch perfect details and tailoring (golden lion buttons? Inverted pleating? Impeccable A-line skim?) have the wink of Wharton, and- like us- her ideal woman is equally at home holding a champagne cocktail on the observation deck as she is holding a lobster with Woody Allen. This architectural, easy-louche camisole is so perfectly New York that we can't help but heart Ari Dein as much as we heart our beloved city.