Hilary Duff is Joined by Nicole Richie at Husband Matthew Koma's Concert in West Hollywood

Hilary Duff and Nicole Richie enjoy a girls' night out as they watch the Disney star's husband Matthew Koma perform with his band in Hollywood

Bratz Celebrates Pride Month by Re-Creating Hilary Duff’s Viral ‘So Gay’ Anti-Bullying PSA: Watch

Kathy Hilton Says Paris and Nicole Richie Still Act Like Kids Together