Gwyneth Paltrow and Cameron Diaz celebrated the reopening of The Arts Club in London's Mayfair with Prince Philip (but sadly no Kate and Wills sightings) last night. Both leading ladies looked beautifully fresh-faced opting for similar pared-back hair and makeup styles. The only difference between the two blondes? Cameron's hair had a natural-looking bend in line with her mouth which gave her style a slightly more carefree feel. Gwyneth's only the other hand was poker straight — a fall-back look for the Contagion actress. Who deserves Best Tressed?