The pop star spells out a shout-out to sons Jayden and Preston during a shopping trip in L.A. Plus: Nicole & Keith, Jessica & Tony, Lauren Conrad and more

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STYLE MAVEN

Lauren Conrad lives it up Saturday at a party she hosted at Christian Audigier The Nightclub in Las Vegas. The Hills star – who will create red-carpet gowns for the trophy girls at the upcoming Emmy Awards – was in town to celebrate the success of her Lauren Conrad Collection.