Omnipeace's "Stamp Out Violence" event at STK drew a star-studded crowd including BFFs Jennifer Aniston, Courteney Cox, and Sheryl Crow, along with Twilight's Ashley Greene. The women spoke about the charity's fight to end violence against women in the Congo, and a pregnant Nicole Richie said, "I'm all about making people aware and showing them what the problem is. It's impossible to turn your back on something like this." Other celebrities like Demi Moore and David Arquette also attended the event and the stars wrote letters to President Obama in a group effort to bring more awareness to the important cause.
To see more photos of Courteney, Nicole, Demi, Ashley, and others, just
Images include: Nicole Richie, Jennifer Aniston, Courteney Cox, David Arquette, Marisa Tomei, Sheryl Crow, Ashley Greene, Billy Corgan, Jackie Johnson