The Richie-Maddens

They're now a family of four! See how Joel Madden and Nicole Richie dote on daughter Harlow and son Sparrow

MONSTER MASH

The Richie-Madden crew party it up Yo Gabba Gabba!-style with Muno and Brobee at a live show at L.A.'s Nokia Theatre on Nov. 27, 2010. "Greetings from Gabba-land!" Richie Tweeted.