Nicole Richie and Joel Madden took Harlow out for some fresh air and a stroll around the neighborhood yesterday. Joel had a long weekend of festivities including Pete Wentz's bachelor party [1] and wedding to Ashlee Simpson [2], but these days it's pretty clear that he and Nicole would rather coo over their baby girl [3] than party with friends. Now that Pete and Ashlee might be expecting a little one of their own, maybe we'll even get to see the two mini rockers playing together in the future.