Cameron Diaz made a cameo last night at a benefit for the organization NY Sun Works, which builds science labs in urban schools. The event, held at the Top of The Standard, was held to raise funds for their Greenhouse Project, an initiative that aims to teach sustainability through the use of hydroponic farming technology. Cameron made the rounds chatting with pals like Russell Simmons and Sidsel Robards, who's the director of program development at New York Sun Works. Cameron's a well-known advocate for green causes. Her activism even earned her a place on our list of the most eco-friendly celebrities.