Televoting was permanently reintroduced in 1999, but the regional jury system was retained, and given a 50% weighting in the overall results. In 2011, the regional juries were abolished and their task was given to juries from other countries that participate in the year's Eurovision Song Contest. 2015 saw the introduction of a mobile app that allowed the public to vote for their favourite entries for free, but only when the songs were being performed. Although used in all semi-finals and the Second Chance round, the app votes were not used in the final due to the system becoming overloaded and ceasing to function about half an hour into the show. The current voting system has been controversial, as it is possible for the song which receives the most votes from the public not to win, as happened in 2005, 2008, 2013 and 2017.