It was a star-studded birthday bash for Harlow Madden!
Rockstar papa Gavin Rossdale was seen with his two sons -- Kingston, 5, and Zuma, 3 -- in Sherman Oaks, California on January 16. Leaving mama Gwen Stefani with a day off, the Rossdale boys and the nanny arrived at The COOP to celebrate the fourth birthday of Harlow Madden, the daughter of Nicole Richie and Joel Madden. This is the same children's play space where Ashlee Simpson and Pete Wentz threw Bronx Mowgli's third birthday.
The Toy Story-themed bash was attended by 35 kids, and all were treated to a visit from the Pixar film's characters Woody, Jessie and Buzz.
Also in attendance was Jennifer Meyer, the wife of Spider-Man star Tobey Maguire, and their two kids Ruby, 5, and Otis, 2. Uncle Benji Madden arrived right after the arrival of Buzz Lightyear and Jessie from Toy Story.
"Harlow started crying when everyone sang happy birthday and Joel said she was crying tears of joy," an onlooker said of the 4-year-old, who munched on pizza and juice, along with a sugar-free Cake Diva confection at the bash. "Everyone had a blast and Joel and Nicole said it was their best kids party yet," the insider added.