THE TREND: Peep Show THE KEY PIECE: Nylon bustier, Elizabeth and James, $445; 25park.com. WHY THIS WORKS: Metallic accessories pop against the chic, all-black look. SHOP THE LOOK: A Clutch, Oscar de la Renta, $390; 877-263-4333. B Shoes, Chrisitian Louboutin, $545; christianlouboutin.com. C Pants, Built by Wendy, $180; builtbywendy.com. D Bracelet, Tom Binns, $225; tombinnsdesign.com.