The New Yorkers for Children benefit attracted a predictably star-studded crowd to the Mandarin Oriental on Wednesday night. In addition to Zac Posen and Coco Rocha in matching ensembles, guests included Josh Hartnett, Emmy Rossum, Andre Balazs, Christine and Steve Schwarzman, Rachel Roy, Rachel Zoe, Topper and Tinsley Mortimer, Lucy Sykes Rellie and husband Euan Rellie, Andres and Lauren Santo Domingo, Alexis Bryan, Fabiola Beracasa, Gillian Hearst Simonds, Diane Kruger and Joshua Jackson, Gillian and Sylvester Miniter, Olivia Palermo ...

The Museum of Natural History held its annual dance last night.

Yves Saint Laurent sponsored the Metropolitan Opera's 125th Anniversary Gala at Lincoln Center on Sunday night. YSL creative director Stefano Pilati was on hand to welcome the likes of Brooke Shields (left), Claire Danes, Claudia Schiffer, Kanye West and Amber Rose, Parker Posey, Kim Heirston, Mia and Patrick Demarchelier, Diane Kruger and Joshua Jackson, Richard Meier, Jeremy Irons, Willem Dafoe, Ingrid Sischy, Emily Mortimer and Alessandro Nivola, Sally Singer, Woody Allen, Stefano Tonchi, James Levine, Renée Fleming, Peter Martins, Julianna Margulies and Keith Lieberthal, Zoe Saldana, Daphne Guinness, Julie Macklowe, Plácido and Marta Domingo, Ginnifer Goodwin, Becki Newton, Patricia Clarkson, Austin Scarlett, and Met mega-donor Mercedes Bass. [PMc, Wireimage, Style.com, VF, FWD]

Valentino and Vogue co-hosted a cocktail party to benefit New Yorkers For Children at Valentino's Madison Avenue store last night. Guests included Fabiola Beracasa and Erin Fetherston (left), Fern Mallis, Tinsley Mortimer, Valesca Guerrand-Hermès, Maggie Betts, Paul Sevigny, Bebe Neuwirth, Jennifer Creel, Selita Ebanks, Alina Cho, Kate Schelter, Antony Todd, Tatiana Platt, Kevin Liles, Denise Wohl, Di Petroff, Felicia Taylor, Erica and Geraldo Rivera, Sylvester and Gillian Miniter, Dori Cooperman, Maggie Rizer, Allison Sarofim, Lydia Fenet, Vanessa von Bismarck, Dayssi Olarte de Kanavos, Susan Shin, Tracy Stern, Melissa Berkelhammer, Stephanie LaCava, and, yes, "Real Housewife" Alex McCord and her husband Simon van Kempen. [PMc, Wireimage, VF, SF]

Andrew Saffir's Cinema Society hosted a screening of He's Just Not That Into You at the Tribeca Grand on Wednesday night. Guests at the screening and after-party, hosted by Stardoll and Philosophy di Alberta Ferretti, included Lindsay Price (left), Olivia Palermo and Johannes Huebl, Michael Kors, Amy Sacco, Anne Hearst and Jay McInerney, Rachel Roy, America Ferrera, Helena Christensen, Eva Amurri, Mamie Gummer, Cuba Gooding Jr., Maggie Rizer, Annelise Peterson, Zoe Kravitz, Lisa Bonet, Lorenzo Martone, Marina Rust Connor, Chris Benz, Christian Siriano, Reed Krakoff, Dori Cooperman, Taylor Momsen, Carson Kressley, Poppy Delevigne, Jane Seymour, Genevieve Jones, Patricia Clarkson, Shoshanna Lonstein Gruss, Irina Pantaeva, Dylan Lauren, Jeff Gordon, Kiera Chaplin, Liam McMullan, Derek Blasberg, and one of the stars of the film, Ginnifer Goodwin. [PMc, Wireimage, VF, Style.com, NYO, FWD]

A crowd of nearly 400 made their annual trip to the Bronx last Friday night for the New York Botanical Garden's 10th annual Winter Wonderland Ball. The black-and-white dinner, sponsored by Chanel, featured appearances by the likes of Cristina and Chris Cuomo, Nina Garcia, Marjorie Gubelmann, Byrdie Bell, Poppy Delevingne, Minnie Mortimer Gaghan, Steve and Christine Schwarzman, Dalia Oberlander, Gillian Hearst Simonds, Alex Kramer, Alexandra Lebenthal, Molly Sims, Holly Dunlap, Erin Fetherston, Margherita Missoni, Zani Gugelmann, Coco Rocha, Gillian and Sylvester Miniter, Bronson Van Wyck, Patrick McDonald, Stephen Knoll, Jessica Joffe, Jill Kargman, Lauren Remington Platt, Coralie Charriol Paul, Joe and Nazee Moinian, Kate Schelter, James and Whitney Fairchild, Lydia Fenet, Maggie Betts, Meredith Melling Burke, and Pamela Fiori. [PMc, Style.com, NYSD, The Daily]

UNICEF's 5th annual Snowflake Gala took place on Wednesday night at Cipriani 42nd Street. Bryant Gumbel entertained the crowd of 500 and Lucy Liu was honored with the Danny Kaye Humanitarian award. Attendees included Michael Bloomberg, Jenna and Barbara Bush, Maggie Betts, Roland Betts, Lauren Bush and David Lauren (left), Marcus Samuelsson, Charlie Trotter, Charlotte Moss, Pamela Fiori, Gillian Miniter, Douglas Hannant and Frederick Anderson, Elyse Newhouse, Donny Deutsch, Alexandra Lebenthal, Jessica Joffe, Tea Leoni, Matt Lauer, Meredith Melling Burke, Cynthia Lufkin, and CNN's Sanjay Gupta. [PMc, Wireimage, Style.com, The Daily]

Gucci celebrated the launch of its Tattoo Heart Collection on Wednesday, a line of products that benefits UNICEF. Rihanna, who is the new face of the campaign, was joined Gucci creative director Frida Giannini at a snowflake lighting ceremony at the Grand Army Plaza, which was followed by an event at Gucci's flagship and dinner at the Plaza's Oak Room. Guests included Madonna, Penn Badgley, Blake Lively, Adrian Grenier, Monet Mazur, Timbaland, Mary J. Blige, Erin Wasson, Becki Newton and Chris Diamantopoulos, Kelly Rutherford, Patricia Field, Charlotte Ronson, Shoshanna Lonstein Gruss, Jessica Joffe, Julia Restoin Roitfeld, Mamie Gummer, Eleanor Ylvisaker, Bethenny Frankel, Anja Rubik, Hal Rubenstein, Magnus Berger, Joe Zee, Kelly Killoren Bensimon, Lizzie and Jonathan Tisch, and Maggie Betts. [Style.com, NYO, PMc, Wireimage]

♦ Alexander Wang was the big winner at Monday night's fifth-annual CFDA/Vogue Fashion Fund awards at Skylight Studios. Wang and fellow nominees like Richard Chai, Jason Wu, Lisa Mayock and Sophie Buhai, Irene Neuwirth, Alejandro Ingelmo, Juan Carlos Obando, Albertus Swanepoel, Swaim and Christina Hutson, and John Patrick were feted by John Galliano (left, with Charlize Theron), Anna Wintour, Diane von Furstenberg, Sally Singer, Andrew Rosen, Reed Krakoff, Jeffrey Kalinsky, Julie Gilhart, Julie Macklowe, Daphne Guinness, Sasha Heinz, Tory Burch and Lyor Cohen, Andre Leon Talley, Narciso Rodriguez, Maria Sharapova, Penn Badgley, Zac Posen, Vera Wang, Chanel Iman, Juliette Lewis, Harvey Weinstein and Georgina Chapman, Tommy Hilfiger and Dee Ocleppo, Lauren Santo Domingo, Peter Som, Piper Perabo, Phillip Lim, Lazaro Hernandez, Maggie Betts, Calvin Klein, Damon Dash and Rachel Roy, and James Franco. [PMc, NYO, Style.com, The Daily]

Lauren Remington Platt and Maggie Betts, who told Vogue they rarely ventured out anymore (partly because Maggie's dad's best friend ruined the economy!) made an appearance at Dolce & Gabbana on Friday night to celebrate the release of The Good Shepherd by Vanity Fair's Michael Roberts. Welcome back, ladies! [NYO]

It's not so cool being a socialite, according to this Reuters article, which observes that women like Tinsley Mortimer and Fabiola Beracasa would rather be known as "designers" or "social activists" than by the S-word, which conjures up images of Paris Hilton. How this constitutes news isn't clear, although it follows a piece by William Norwich in this month's Vogue (not online, summary here) in which Lauren Remington Platt says she doesn't go out anymore (we're guessing last weekend was an exception?) and Maggie Betts blames the decline of the socialite on the economy and overexposure from the Internet. (It's probably worth noting that it was Maggie's dad who did more than anybody to insure George Bush got elected, so if she's looking for people to blame for the recession, well, she knows who to talk to.) But the worst thing about the Reuters piece? It lumps Tinsley and Fabiola in the same category as Devorah Rose, which may very well have sent the Tinz into a tizzy this morning.

A social fixture and pal of Barbara Bush, Betts is the daughter of Chelsea Piers developer Roland Betts, a Bush BFF himself.