Gwen Stefani strutted her hot rocker stuff on the streets of NYC in an all-black ensemble: a leather peplum top, faded black skinny jeans, and peep-toe booties. Gold sunglasses added major shine, while her signature red lipstick injected a much-needed pop of color. Leather peplum tops have become quite the style staple lately — check out Olivia Palermo in hers — so if you don't yet have one in your closet, let Gwen inspire you to buy one now. We love this vegan leather peplum top from Urban Outfitters ($89) with everything from jeans to skirts to shorts. Peruse more leather peplums on ShopStyle, and to get Gwen's entire look, shop the widget below.