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Giorgio Armani celebrated the opening of his new Fifth Avenue flagship last night with a party at the store. The designer was accompanied by his niece Roberta Armani; guests on hand included Leonardo DiCaprio (left), Carine Roitfeld, Victoria Beckham, Martin Scorsese, Michael Bloomberg, Caroline Kennedy, Joel Klein, Cindi Leive, Fern Mallis, Andre Leon Talley, Ricky Martin, Rachel Zoe, Nina Garcia, John Mayer, Mario Testino, Josh Hartnett, Liam Neeson, Richard Meier, Alicia Keys, Chace Crawford, Milla Jovovich, Thom Browne, Kevin Liles, Molly Sims, Mira Sorvino and Christopher Backus, Sally Singer, David Hershkovits, Jim Moore, Hal Rubenstein, Patrick McCarthy, Emile Hirsch, Natalia Vodianova, Zani Gugelmann, Kate Lanphear, Horacio Silva, January Jones, Elsa Pataky, Zoe Saldana, Solange Knowles, Marcus Schenkenberg, and Olivia Palermo. [PMc, Wireimage, Vogue UK, FWD, NYM]

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• Narciso Rodriguez celebrated his latest collection with an after-party at Rose Bar last night. His guests included Claire Danes, Jessica Seinfeld, Giorgio Armani, Julianna Margulies and Keith Lieberthal, Kanye West and Amber Rose, Chace Crawford, Leigh Lezark, Greg K, Josh Hartnett, Carlos Souza, Hana Soukupova, Brazilian actress Sonia Braga, and Rose Bar creative director Nur Khan. [PMc, Wireimage, NYM]

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• Vladimir Restoin-Roitfeld celebrated the opening of his new Louis Vuitton-sponsored photo exhibit at Collective Hardware last night, which was followed by an after-party at Indochine. Vladimir was flanked by his mom (French Vogue editor Carine Roitfeld), sister (Julia Restoin-Roitfeld), and girlfriend (Lily Donaldson), and welcomed guests like Mary-Kate Olsen, Gisele Bundchen, Leonardo DiCaprio, Claire Danes, Leigh Lezark, Genevieve Jones, Fabiola Beracasa, Benicio del Toro, Milla Jovovich, Alexander Wang, Hilary Rhoda, Natalia Vodianova, Paris and Nicky Hilton, Alexandra Richards, Theodora Richards, May Andersen, Erin Wasson, Lara Stone, Zoe Kravitz, Charlotte Sarkozy, Justin Portman, Cory Kennedy, and Geordon Nicol, along with the artists whose work is included in the exhibit: David Mushegain, Salim Langatt, and PC Valmorbida. [Wireimage, NYO, WWD]

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• At the William Rast after-party at Rose Bar on Monday night, Justin Timberlake and Jessica Biel were joined by Rast co-designers Trace Ayala and Marcella and Johan Lindeberg, as well as guests like Joe Zee, Rachel Zoe, Emile Hirsch, JC Chasez, Gerard Butler, May Andersen, Nur Khan, NFL star Vernon Davis, and Justin's mom Lynn Harless. [NYP, Style.com]

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• At the opening of Matthew Williamson's new meatpacking district boutique on Sunday night, guests included Lindsay Lohan, Heidi Klum, Ann Dexter-Jones, Mischa Barton, Fern Mallis, Lauren Santo Domingo, Rachel Zoe, Fabiola Beracasa, Poppy Delevigne, Robert Burke, Santogold, Lorenzo Martone, Joy Bryant, Anja Rubik, Becki Newton, Kelly Rutherford, Waris Ahluwalia, Lily Collins, Katherine McPhee, and Zelda Kaplan. [PMc, Wireimage, FWD, Style.com, NYM]