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They're now a family of four! See how Joel Madden and Nicole Richie dote on daughter Harlow and son Sparrow
Updated: Wednesday Jul 17, 2013 | 05:00 PM EDT
By: Karen Quan
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Richie and Sparrow, 18 months, bring up the rear as daughter Harlow, 3, pounds the pavement April 5 during a park playdate in Studio City, Calif.
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