Social media has made some members of the next generation into mini fashion stars. J. Crew has partnered with one of these pint-sized fashionistas to make her what must be the youngest designer collaborator in history. Four-year-old Mayhem became famous when her mother began posting her paper dress creations online, and J.Crew is making some of those paper designs come to life this spring. J.Crew president and executive creative director Jenna Lyons reportedly emailed Mayhem directly to get her involved. (Racked)