Fashion Scoops: Date With Poiret... Make Mine A Stella...Sweet Tooth

DATE WITH POIRET: While some major fashion houses are keeping mum about their guests at next week's Costume Institute benefit, Yves Saint Laurent creative director Stefano Pilati's date for the night will be Julianne Moore. The actress has been friends with the designer for a while and is, of course, expected to wear a dress from his much-praised fall collection to the Metropolitan Museum of Art on Monday.

MAKE MINE A STELLA: Stella McCartney plans to do a trunk show with a twist — so to speak — later this week at Bergdorf Goodman. The ever-cheeky designer will be infusing the show with an English pub vibe, serving up Guinness and inviting her guests to play foosball in between fittings. "The Yankee in me is looking forward to coming to the city and having some fun," said McCartney. "Bergdorf Goodman bought my first collection when I left college and has supported us ever since." The show, which will take place Thursday and Friday, will be hosted by Liv Tyler, Jessica Seinfeld and Helena Christensen. Sources say Tyler's husband's band, Arckid, will play. On Friday, McCartney will host a private dinner for friends, and on Monday she's headed over to the Met's Costume Institute Ball.

SWEET TOOTH: Ever wonder what goes into a "Falling in Love" pie? How about one dubbed the "I Hate My Husband" dish or the tongue-twisting "Pregnant, Miserable, Self-Pitying Loser" pie? More than 350 guests found out Sunday at the New York screening of "Waitress," the final film by the late Adrienne Shelly, which stars Keri Russell as a waitress with a penchant (and wonderfully mouthwatering talent) for baking pies to fit every sort of occasion and mood. Post-screening, moviegoers — and members of the cast including Russell, Cheryl Hines, Nathan Fillion, Lew Temple, Eddie Jemison and Jeremy Sisto — were treated to some tasty eats themselves, at Danny Meyer's neighboring Shake Shack in Madison Square Park. Interview's Ingrid Sischy, whose magazine was cosponsoring the event with DKNY, played the ever-gracious host, sending trays of food to guests where needed. Quipped Donna Karan, who was also there, to the editor in chief: "Oh, you are such a mother."

But there was another mère in attendance who caught Karan by kismet-ridden surprise: the mother of Andrew Ostroy, Shelly's widower — it turns out her husband used to chauffeur the designer around back in her old Anne Klein days.