Busy Night at L.A.'s Crown Bar!!!

Last night was a busy night at L.A.'s Crown Bar. Nicole Richie and Mary-Kate Olsen, were spotted giggling and whispering to each other at . At one point, the pair – who sat at a table near the deejay booth – walked hand-in-hand across the dance floor and perched together in an unoccupied corner to continue their conversation.

Nicole's twin/copycat/sometimes best friend Paris Hilton and boyfriend Benji Madden hung out with Nicky Hilton and David Katzenberg. Later in the night they were joined by Audrina Patridge, who table-hopped around the bar. Also making the scene: Patridge's Hills costars Lauren Conrad and Lauren 'Lo' Bosworth, as well as Jamie Foxx and Dave Navarro, who had his arm around a blonde female companion.