Celebrities, including supermodels and pop stars, were out in force with art collectors and dealers for the biggest charity art auction in history in New York last week. It was Valentine's Day, and Sotheby's was selling 73 works to raise money for United Nations-funded relief programmes for HIV and Aids in Africa.
Organised by Bono, the lead singer of U2, and Damien Hirst, whose support Bono had enlisted after taking him on a boat trip in France and plying him with alcohol, the...