Ai Weiwei is number one. Hardly surprising considering the amount the poor man was in the press this last year. Let us not forget though he had his zodiac animal heads at Somerset House, and exhibitions in both The Lisson Gallery and The Tate Modern or as Grayson Perry called it the 'Cathedral of modern art'. I particularly thought Sunflower Seeds was a very challenging work looking at the history of China's workers and its ceramics industry. Truly the most well heard Chinese voice on the international art stage.