Kingston Rossdale's Star-Studded Birthday Bash

With all of the celebrity babies being born, our favorite actresses and rockstars have even more reason to throw swanky parties. And Gwen Stefani and Gavin Rossdale celebrated their son Kingston's 2nd birthday in style.

Yesterday the "Hella Good" singer and her "Glycerine" hubby invited a who's who of celebrity parents over to their Beverly Hills, California estate for a killer kids' soiree.

Christina Aguilera and hubby Jordan Bratman arrived with their newborn son Max. And the happy trio looked so happy together as a family as they partook of the many attractions at the party.

Also in the house were Nicole Richie, Joel Madden, and their daughter Harlow Winter. Add in Victoria Beckham with son Cruz and you've got a paparazzo's dream event.

All afternoon, the guests enjoyed the rented inflatable jump room, as well as some small farm animals at the petting zoo.