According to Eurovision rules, all nations with the exceptions of the host country and the "Big Five" (France, Germany, Italy, Spain and the United Kingdom) are required to qualify from one of two semi-finals in order to compete for the final; the top ten countries from each semi-final progress to the final. The European Broadcasting Union (EBU) split up the competing countries into six different pots based on voting patterns from previous contests, with countries with favourable voting histories put into the same pot. On 17 January 2011, a special allocation draw was held which placed each country into one of the two semi-finals, as well as which half of the show they would perform in. Portugal was placed into the first semi-final, to be held on 10 May 2011, and was scheduled to perform in the second half of the show. The running order for the semi-finals was decided through another draw on 15 March 2011 and Portugal was set to perform in position 16, following the entry from Hungary and before the entry from Lithuania.
