This picture taken on December 10, 2010 shows an exhibition at the Nobel Peace Center in Oslo highlighting this year's Nobel Peace Prize laureate, Liu Xiaobo (R), next to a portrait of last year winner US President Barack Obama, a few hours before its opening. Confusion over which countries would attend the peace prize ceremony for jailed Chinese dissident Liu Xiaobo grew Friday just hours before the event with organisers adding more names to the list. AFP PHOTO / SCANPIX - Berit Roald