True to form, Naomi Watts  dazzled in a Givenchy Haute Couture custom gown at the Costume Institute Gala at the Metropolitan Museum of Art in NYC on Monday. However, this year, she didn't have partner Liev Schreiber  by her side. The Met Gala has played a pivotal role in their relationship — the actress revealed she got "ballsy" and made the first move on him  at the 2005 event. Nine years later, the couple is busy juggling projects and raising their two children, Sasha and Kai, in LA. Last month, Naomi got a chance to let loose during a star-studded ladies' night out  with pals Gwen Stefani , Gwyneth Paltrow , and Nicole Richie . Keep reading to see her glamorous night, and be sure to check out the all-time best dressed guests from the Met Gala .