The fashionista daughter of Goldie Hawn topped off her elegant look with a horn necklace and clutch bag.
Other celebs at the 3rd annual event included rocker Katy Perry, Sex & The City stars Kristin Davis and Sarah Jessica Parker, supermodel Alessandra Ambrosio and comic Chelsea Handler, who served as host.
The Almost Famous beauty, 33, is just more than a year removed from giving birth to her son, Bingham, with fiancé Matthew Bellamy.
She also has a son, Ryder, with ex-husband, Black Crowes front man Chris Robinson. Hudson was previously romantically linked to New York Yankee Alex Rodriguez, cyclist Lance Armstrong and actor Owen Wilson.