Aguilera and husband Jordan Bratman celebrate the opening of a new art museum in L.A. Plus: Sienna Miller, Nicole Richie and more

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LADIES NIGHT

Alicia Keys, Rihanna and Fergie, who are all nominated for Grammys and are all scheduled to perform at the 50th anniversary telecast Sunday, start the celebration early at the Clive Davis pre-party at the Beverly Hilton Saturday in Beverly Hills.