Who: Cameron Diaz.
What: Showing the 20-somethings how it's done in a stylish LBD, paired with classy stilettos and a statement choker. The face-framing fringe helps to highlight the flawless makeup and her glowing complexion.
Where: Helping to raise money for UN Women and New York Cares' Hurricane Sandy Relief Effort benefit held at the Museum of Natural History, New York.
Verdict? Forty and fabulous.