Mapping favouritism at the Eurovision Song Contest: does it impact the results?

Ever since the Eurovision Song Contest exists, there are suspicions that the voting is politically biased. Based on the most recent 45 editions, this paper maps out which participating countries can count on each other's sympathy and which cannot. Although there are clear preferences between countries, political voting rarely determines the overall result and the best entry wins. Corrected for favouritism, Sweden is the most successful country and 'Save your Kisses for me' is the 'best' song since 1975.