(L-R) Lucian Freud Portraits exhibition curator Sarah Howgate, National Portrait Gallery Director Sandy Nairne and Catherine Duchess of Cambridge talk as they attend the Lucian Freud Portraits exhibition at the National Portrait Gallery in London on February 8, 2012. The Duchess of Cambridge carried out her first public solo engagement, a private viewing of an exhibition of work by the late artist Lucian Freud at the National Portrait Gallery. AFP PHOTO / POOL / JORGE HERRERA (Photo credit should read JORGE HERRERA/AFP/Getty Images)