Stella McCartney

Models, designers, editors, and celebrities fled New York for the U.K. this week to see a fresh set of looks hit the runway at London Fashion Week. Here's a behind the scenes look.

Stella McCartney hangs at a Nets game, Lupita Nyong'o and Kerry Washington become BFFs, and Georgia May Jagger turns 22 in Vegas. Plus, more of the week's best fashion Instagrams.

The BORNFREE campaign, dedicated to eliminating the mother-to-child transmission of HIV, launched a collaboration with the fashion world on Wednesday with the help of Diane von Furstenberg and Anna Wintour.