Jamie McCarthy/Getty Images for Conde Nast Traveler

WHAT SHE WORE Olivia Wilde hit an N.Y.C. bash in Alexander McQueen's plunging dress, jeweled belt, skull clutch and sleek stilettos, Little H for Pearl Collective drop earrings and a lapis House of Lavande cocktail ring.

WHY WE LOVE IT Chic accessories enhanced this LBD's not-so-basic black appeal.

CELEBRITY: Olivia Wilde

TREND: Belts

36 of 80

Olivia Wilde

Olivia Wilde stepped out in Alexander McQueen