Gwen Stefani with her son, Kingston on Malibu beach. Malibu, California - 26.05.08

The couple hosted the cowboy-themed event at their Malibu, California home and made it a memorable day by hiring ponies and encouraging attendees to don fancy dress.

Good Charlotte rocker Madden made an appearance without his girlfriend Nicole Richie, bringing along their four-month-old daughter Harlow.

Beckham arrived with her youngest son, three-year-old Cruz - who was dressed in a monkey costume.

Stefani is expecting her second child.

Source: WENN