CLINT SPAULDING/PatrickMcMullan.comFashion's Night OutOn Fashion’s Night Out, The Daily Beast drinks cocktails with Mary Kate and Ashley, plays polo with Ralph, and sings arias with Oscar de la Renta. VIEW OUR GALLERY.09.10.09 6:59 PM ETCLINT SPAULDING/PatrickMcMullan.comCLINT SPAULDING/PatrickMcMullan.comAll That JazzIsaac Mizrahi belted out a cabaret selection for the crowd at Bergdorf Goodman on Fashion's Night Out. Paul Morigi/Getty Images for Barneys New YorkThe Mary-Kate MartiniMary-Kate and Ashley Olsen bartended at Barneys early in the night. One confused shopper reportedly left a tip for the twins-- before realizing who had served his drink.Paul Morigi/Getty Images for Barneys New YorkDown and DirtyJonathan Adler jumped behind the potter's wheel at Barneys to throw pots for adoring fans.Marion Curtis/startraksphoto.com Three's The CharmOscar de la Renta, Barbara Walters and Sarah Jessica Parker led the crowd in a massive sing-a-long at de la Renta's Madison Avenue store. Marion Curtis/startraksphoto.com That's FierceRihanna, dressed in a hooded dress and studded sunglasses, caused hysteria during her five-minute lap around Intermix's SoHo store.Humberto Carreno/startraksphoto.comDressed and TressedGwen Stefani stopped by Bloomingdale's in New York. Jerritt Clark/Getty Images for Bloomingdale'sFashionable FriendsAnna Wintour and Gwen Stefani greeted fans at Bloomingdale's -- before Anna jetted off to the next event. Jerritt Clark/Getty Images for Bloomingdale's Shopping With La LohanLindsay Lohan took a minute to shop on Thursday night -- from her own line, of course. Lohan posed with leggings from her 6126 line at Bloomingdale's.Sara Jaye WeissDancing With DVFDiane von Furstenberg and Tracy Anderson lead crowds in a massive dance party at von Furstenberg's downtown store.Getty ImagesThe Queens KickoffDiane von Furstenberg and Kate Hudson traveled to the Queens Center Mall to cut the ribbon for Fashion's Night Out in Macy's. Getty ImagesStaying CoolModel Daria Werbowy puckered up at the Sunglass Hut & Vogue Eyewear party.Getty ImagesGrand EntranceDesigner Michael Kors and actress Debra Messing walk through the streets on a red carpet. Getty ImagesNew Teens on the BlockTaylor Momsen may be the single reason traffic in lower Manhattan was at a standstill on Thursday night: she performed with her band, the Pretty Reckless, in the middle of Perry Street for Teen Vogue Fashion's Night Out Fashion Show.Getty ImagesAcross the PondErin O'Connor and Sarah Brown attended a drinks reception hosted by Vogue & Burberry to celebrate Fashion's Night Out in London. Getty ImagesBring out the PenDesigner Narciso Rodriguez signed a Fashion's Night Out t-shirt at Bergdorf Goodman in New York.Getty ImagesItalian DressingEva Herzigova attended Vogue's Fashion's Night Out party at the Dolce & Gabbana boutique in Milan.Getty ImagesThe GodfatherDesigner Manolo Blahnik held court at Bergdorf in New York. Getty ImagesA Conservative EveningSamantha Cameron, wife of Conservative Party leader David Cameron, lit up the room at Vogue and Burberry's cocktail reception in London. Getty ImagesLooking PoshVictoria Beckham signs a limited edition Fashion's Night Out t-shirt at Bergdorf Goodman in New York. Getty ImagesDashingBrit it-girl Pixie Geldof rushes into the Burberry party in London.Getty ImagesLa Dolce VitaLetizia Moratti, Giorgio Armani, and Franca Sozzani (Editor-in-Chief of Italian Vogue) attended the Vogue party in Milan. Getty ImagesDK Does NYDesigner Donna Karan attended the Saks Fifth Avenue celebration of Fashion's Night Out in New York. Getty ImagesModel Behavior Natalia Vodianova and Claudia Schiffer perused the racks at Burberry's store in New York. Getty ImagesWhite NightCosmetics heiress Aerin Lauder attended the party at Saks. Getty ImagesGot It CoveredActress Charlize Theron Dior looked radiant as she signed autographs of her Vogue September issue at the Dior store in New York.Getty ImagesSpanish DelightSpanish actress Paz Vega attends Fashion's Night Out in Madrid.