Parties! The style, stars and scoop from Hollywood's hottest events

Richie showed off her post-baby body (in vintage Jil Sander) when she helped boyfriend Joel Madden celebrate the opening of his DCMA Collective clothing store in Los Angeles. "It's so cool to see this come to life because this has been Joel's dream for a very long time," Richie has said. "When I was pregnant I would always wear Joel's DCMA T-shirts, but now I'm excited to wear the girls' stuff. And Harlow wears custom DCMA."