Harlow Madden’s Star Studded 3rd Birthday Party!

Kids rocked the fashions at Nicole Richie and hubby Joel Madden’s star-studded birthday party yesterday for their daughter Harlow, who turns three on Tuesday!

The extravaganza was held at the Tree House Social Club in Beverly Hills and a whole lotta folks stepped out to join the party, including Kourtney Kardashian and son Mason, Gwen Stefani and son Kingston, Ellen Pompeo and Chris Ivery brought daughter Stella. Jessica Alba was also spotted joining the shindig.

Nicole and Harlow were also snapped arriving for the party as well!

Which kid do you think was best dressed? I’m going with Kingston…