Nicole Richie stopped by a friend's house in LA yesterday wearing bold eye makeup and a familiar cozy sweater. It was her latest social engagement after spending Saturday with other pals like Kate Hudson and Demi Moore at Rachel Zoe's baby shower. On Sunday, though, Nicole was back to her regular gym routine. Nicole has been spotted leaving Tracy Anderson's studio with Khloe Kardashian and Ashley Greene in the past, and now Jessica Simpson may join the famous gang for one of her workouts. Joel Madden, meanwhile, is apparently home again during a break from his world tour with Good Charlotte, and he found some time to recently film something for Funny or Die.