Emma Roberts and Rachel Bilson  got dressed up for the Chanel  NRDC Celebration of Art, Nature, and Technology dinner in LA last night. It was a star-studded affair as Tobey Maguire  and his wife, Jennifer Meyer , as well as Cindy Crawford  and her husband, Rande Gerber, and Pharrell Williams and his fiancée, Helen Lasichanh, were in attendance. Although Cindy, Tobey, and Pharrell had their significant others along, Rachel and Emma stepped out solo for the evening celebrating environmental action. Despite being without her boyfriend, Evan Peters, Emma revealed that she enjoyed the night out, writing on Twitter, "Such a beautiful dinner with Chanel and NRDC."
Emma did have Evan's support a few weeks ago when she took the stage for Glamour's "These Girls" event  in NYC, where she shared a written essay detailing her efforts to lead a normal college life. Rachel also got in a bit of romantic time with her beau, Hayden Christensen , during a bikini-filled getaway to Barbados  in April.