Congratulations: 50 Years of the Eurovision Song Contest was a television programme organised by the European Broadcasting Union (EBU) to commemorate the Eurovision Song Contest's fiftieth anniversary and to determine the contest's most popular entrant of its fifty years. Hosted by Katrina Leskanich and Renārs Kaupers, the event took place at Forum, in Copenhagen on 22 October 2005. The host was Danish broadcaster DR. Fourteen songs from the contest's first half-century, chosen through an internet poll and by a jury, contested the event.

DR, officially the Danish Broadcasting Corporation in English, is a Danish public-service radio and television broadcasting company. Founded in 1925 as a public-service organization, it is Denmark's oldest and largest electronic media enterprise. DR is a founding member of the European Broadcasting Union.