Jessica Alba has been flitting about Paris all week at the haute couture shows, looking completely chic at every turn (she won our best dressed poll in the front row at Chanel with a whopping 54.8% of the votes!), but it was a Valentino evening gown that really had us obsessing...

Jessica attended a dinner party for the Valentino Garavani Archives on Wednesday night wearing a ruffled asymmetrical dress from the Valentino fall 2010 collection in the label's signature shade of scarlet. There's a sexy flamenco vibe to it, a contrasting layer of nude chiffon beneath the red suggesting just a hint of skin, and an amazing train that trails just long enough to announce, "I'm a star!"

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This past week, Jason Wu took his speedily growing business (and a decidedly Parisian resort collection inspired by the French New Wave and the yé-yé Franco-pop movement) to haute couture for the first time. Despite a hectic schedule, the 27-year-old took a moment to share his top five Parisian hangouts—day by day—for Vogue.

Thursday, July 1: Bastille showroom—“It’s an old French apartment painted gray—my signature color!” said Wu of the location where he presented his collection to European and Asian press and buyers and has been everyday since the middle of last week. “It’s the perfect marriage of old French flavor and modern decor that I love.” Aside from adding more than 25 new international stores to his roster while he temporarily set up shop in the space, it seems there is another reason for him to love this particular location: “It’s got such a great view!” said Wu. “You can see l’Opéra Bastille, and I saw a bicycle demonstration here with more than 1,500 bicyclists!”

Saturday, July 3: Musée du Petit Palais—“I queued for an hour!” said the designer , laughing, of the long line to see the Yves Saint Laurent exhibit at the little-sister building of the Grand Palais. “But it was so beautiful that it was totally worth the wait.” His most memorable moment? “A wall of tuxedos from the past few decades. I did a lot of tuxedo looks for resort, so it was inspiring to have it come full circle.” This turn-of-the-century building is a regular stop for Wu, who took time musing over the statues on the museum’s grounds: “I love the fluidity of the sculptural renderings of a woman’s form—and the architecture itself here is amazing!” he said.