Cameron Diaz  Stella McCartney The Met Ball: What we saw last night on the Red Carpet 1. Dresses with a deep back cleavage, most of them in gold and black.      Kate Upon Michael Kors Rihanna Tom Ford    Renee Zellweger                                  Emilio Pucci                                      2. Bright Colors; definitely lots of yellow on the red carpet and of course Coco's pink hair!                                    Coco Roch...