Making for the perfect way to spend the weekend, the stars turned up in full force for the "Yo Gabba Gabba! Live! There's A Party In My City" show in Los Angeles, California on Saturday (November 27).
Held at Nokia L.A. Live, musician/magician DJ Lance Rock took the stage while welcoming Nicole Richie and Joel Madden - who were with children Harlow and Sparrow - onstage as super-secret special guests.
With all of the Nickelodeon Jr. characters partaking in the show, Brobee, Foofa, Muno Plex, Muno and Toodee kept the little ones laughing throughout the entire one hour extravaganza.
Watching on from the audience were Tinseltown stars and their kiddies including Jessica Alba and Honor, Gwen Stefani with Kingston and Zuma, Jaime Pressly and Dezi James, Jack Black and son Thomas, as well as Milla Jovovich and daughter Ever Gabo Anderson.