It was another celeb-packed day at Mercedes-Benz Fashion Week -- where Serena Williams made her first appearance since her U.S. Open loss and outburst!
The tennis star popped up at the Vera Wang show with friend Kim Kardashian, where she was wearing a loose-fitting brown dress belted at the waist.
Wang's show also brought out Kim, La La Vazquez, Beyonce, Solange and even Madeline Albright!
The other hot ticket today was the Herve Leger show, where Ashlee Simpson showed off some serious cleavage alongside a newly dark-haired Katie Cassidy, Jessica Szohr, LeAnn Rimes and "True Blood" star Janina Gavankar.
Backstage Ashlee revealed she and Jessica are launching a fashion line for tweens together in October. What do you think of Ash's style?
Also spotted: Daisy Fuentes (who looks incredible at 44), Audrina Patridge, Gerard Butler and Dakota and Elle Fanning, who gave off a creepy "Children of the Corn" vibe when standing next to each other.
Check out all the photos above!
