When it comes to its fundraising campaigns, amfAR, the nonprofit AIDS research foundation, means business. Thursday night's Cipriani gala, attended by the likes of Ashley Olsen, Natalia Vodianova, Lauren Bush, and David Lauren, generated $900,000 for the cause—$102,000 from the live auction alone, which featured a trip to Art Basel Miami and a walk-on part in the next Terminator movie. "Come on," cajoled Jamie Niven. "This is your chance to get terminated!" Later, easy-listening patron saint Barry Manilow took the stage to belt out a few of his hits, some of them a cappella. Erin Wasson used the opportunity to sneak outside for a smoke break, but Becca Cason Thrash sat riveted in her seat. "Who can sing like that without backup?" gushed the Houston socialite. "No one. Not even Streisand."

After presenting Paris Vogue's Carine Roitfeld with an award for her amfAR contributions, Marc Jacobs, whose hair is blue again, headed down to the Tribeca Grand, where the Cinema Society and W magazine were hosting a screening of the Sundance Channel documentary Marc Jacobs & Louis Vuitton. "Some designers can make you look beautiful," said Anne Hathaway, one of the celebs in a crowd that included Heidi Klum, Joy Bryant, Maggie Rizer, and Josh Hartnett. "But Marc makes you feel it, too, in a way you wouldn't expect."