The Diesel team looks at any occasion as a potential party (last year's around-the-world bash to launch Diesel TV comes to mind), and on opening day of their largest store—a Fifth Avenue "mega flagship"—they brought the good times to the Black Gold runway. A trumpeter busting out jazzy renditions of Lou Reed and Nirvana hits set the stage for a collection that may have been inspired by the Roaring Twenties but was mostly an ode to today's street culture.

The girls played it up in coquettish, lingerie-inspired dresses, lace-up tanks with garter-belt hems, and nubby wool sweaters with faux-corset insets. In one of the final looks, Freja Beha Erichsen worked a number that echoed a factory jumpsuit, but for the open panels that left most of her tattoos on display. The effect was all a bit "she's come undone"—something it seems the Diesel brand is in no danger of.