Harlow Madden has some seriously famous friends!
The 2-year-old daughter of Nicole Richie and Joel Madden celebrated her upcoming 3rd birthday over the weekend -- where her famous parents weren't the only celebs in attendance.
Gwen Stefani, hubby Gavin Rossdale, Jessica Alba, Ellen Pompeo, Sara Gilbert, Tobey Maguire's wife Jennifer Meyer and all their cute kids all went to Treehouse Social Club this weekend in L.A., where they celebrated the birthday girl.
Check out all the adorable photos!
