On June 5, Nikki attended the Simon G. Jewelry 'Summer Soiree' event benefiting Global Green U.S.A. at The Venetian Resort Hotel Casino in Las Vegas. Global Green U.S.A. is the United States affiliate of Green Cross International fosters a global value shift toward a sustainable and secure world by reconnecting humanity with the environment. It's always nice to hear about the charity and philantropy work that the Twilight actors are involved in!

With singer/actress Jessica Lowndes and actor Gilles Marini

With actress Krysten Ritter

Getty Images