Scarlett Johansson

In an attempt to win over fashionable young women, J.C. Penney Co. is going to try running with a faster crowd. This week, the Plano, Texas-based retailer unveiled an unconventional collaboration with Mango MNG Holding SL, the closely-held Barcelona chain known for whipping up cutting edge looks that go from design studio to store shelves in as little as four weeks.