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Michelle Monaghan joined Nicole Richie (in Emilio Pucci) at the 2012 Fifi Awards, the biggest awards in the scent industry, held at Lincoln Center in New York City. Richie chose a ’60s inspired ensemble for the annual event hosted by The Fragrance Foundation, finishing her look with Brian Atwood pumps and a retro beehive bun. Click through the gallery to see Amy Poehler, Karolina Kurkova, and more stars at last night’s hottest parties.

The InStyle Hairstyle Try-On iPad App already includes over 300 celebrity hairstyles, and we want you to help us decide which looks we should add next! Just visit InStyle‘s Facebook page to vote for your favorites, from Michelle Monaghan’s auburn waves to Jennifer Aniston’s long bob. To cast your votes, log onto Facebook, check out the hottest new styles in the gallery, and click the “Like” button to vote. Voting closes on Monday and the styles with the most votes will available on the iPad in October. 

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— Shannon Farrell

While Michelle Monaghan showed up to the New York premiere of her new action thriller Source Code wearing a bright teal dress by Roksanda Ilincic, she confessed that her personal style is much different than her character in the movie, Christina Warren. “In the movie, unfortunately, I wore the same outfit over and over again so I didn’t really feel like there was much style,” Monaghan told us. “It was kind of boring but it was comfortable and that was the most important thing.” So did she slip anything away after filming wrapped? “Usually there is something I want to take home to remember the movie, but no, I just kind of left it all there.” If there’s one thing did take away about style, it’s from sexy co-star Jake Gyllenhaal: “He’s got a great head of hair,” she said. See more celebrities at the Source Code premiere in the gallery.

MORE: Michelle Monaghan’s 2011 Style

— Reporting by Kate Law