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Nicky Hilton and David Katzenberg, being led to their favorite table at Opera right next to the deejay booth. On hand for the Hornitos tequila launch party – hosted by the margarita-lovin' Ashlee Simpson – Hilton and Katzenberg got more animated when Paris Hilton arrived, dancing like crazy to hip-hop tunes. Also partying at Opera: rapper Eve, keeping a low profile and party host Simpson, who showed up sans beau Pete Wentz wearing black tights, a black mini-dress, and her "favorite" Dior black, leather motorcycle jacket.
Beyoncé and Jay-Z, singing to each other from their banquette off the main dance floor at New York nightclub Marquee. "It was adorable," an onlooker tells us of the serenade. So what were they singing? Their own hits, of course! The two sang along to "Show Me What You Got" and "Crazy In Love" and danced together.
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Kate Beckinsale, showing off her best accessory – director hubby Len Wiseman – at the P.S. Arts Party at CHANEL Beverly Hills. Clad in a "glamorous '50s housewife" dress, the actress teased, "I've brought my policeman, if you've noticed." Inside the fashionable fete, the pair mingled with celebrity guests – including another celebrity pair: Big Love actress Ginnifer Goodwin and beau Chris Klein.
By REAGAN ALEXANDER, LESLEY MESSER, JENNY SUNDEL and MICHELLE TAN
Friday's Caught in the Act >














