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Paris & Benji and Nicky & David Katzenburg turned out for the Brent Shapiro Foundation Sober Day USA 2008 event last night in Beverly Hills.

The Hilton girls looked beautiful and we're sad to say, we didn't see Ms. Lohan there looking beautiful. Should Lilo be making an effort to support a cause like this?

CLICK HERE to see the gallery of the Hilton girls at the event