Gwen Stefani Sparrow Madden Birthday Party Cash Warren Joel Madden Zuma Rossdale Pregnant Kourtney Kardashian Gwen Stefani Sparrow Madden Birthday Party Cash Warren Joel Madden Zuma Rossdale Pregnant Kourtney Kardashian

Sparrow Madden certainly had one heck of a guest list at his 4th birthday bash on Saturday afternoon!

From Jessica Alba to Gwen Stefani to Kourtney Kardashian, some of Hollywood's hottest moms brought their kiddos to celebrate with Nicole Richie and Joel Madden's son at a hotel in Beverly Hills.

Joel helped wrangle the guests, and speaking of kids, there's still no word on whether Gwen is really pregnant with her third child, but she's definitely keeping us guessing with her outfits:

Gwen Stefani Sparrow Madden Birthday Party Cash Warren Joel Madden Zuma Rossdale Pregnant