Battle Of The LBDs: Nicole Richie, Diane Kruger &Amp; Joan Collins At The UNICEF Ball

A whole host of stars descended on the Beverly Wilshire in California last night for the annual UNICEF charity ball - and we couldn't help but notice a definite mini-trend in glam black evening gowns...

Diane Kruger also upped the style ante in a backless Passion for fashion? Follow us on Twitter and become our fan on Facebook