September's Must-See Celebrity Moments!

Our favorite stars barreled their way through September with plenty of bikini shots, premieres, and Fashion Week appearances. Blake Lively mingled with the fashion crowd over at Milan Fashion Week, while Bradley Cooper and Hayden Panettiere both spent a little recuperation time on the beach. Meanwhile, Justin Timberlake headed to Vegas to premiere Runner Runner, and Jennifer Aniston cozied up to Justin Theroux at the Toronto International Film Festival.

From Miley's onstage tears to Brad Pitt's new — and very much improved — haircut, check out the best snaps from the month of September!