text: Several anniversary events, and related contests under the "Eurovision Live Events" brand, have been organised by the EBU with its member broadcasters. In addition, participating broadcasters have occasionally commissioned special Eurovision programmes for their home audiences, and a number of other imitator contests have been developed outside of the EBU framework, on both a national and international level.
  The EBU has held several events to mark selected anniversaries in the contest's history: Songs of Europe, held in 1981 to celebrate its twenty-fifth anniversary, had live performances and video recordings of all Eurovision Song Contest winners up to 1981; Congratulations: 50 Years of the Eurovision Song Contest was organised in 2005 to celebrate the event's fiftieth anniversary, and featured a contest to determine the most popular song from among 14 selected entries from the contest's first 50 years; and in 2015 the event's sixtieth anniversary was marked by Eurovision Song Contest's Greatest Hits, a concert of performances by past Eurovision artists and video montages of performances and footage from previous contests. Following the cancellation of the , the EBU organised a special non-competitive broadcast, Eurovision: Europe Shine a Light, which provided a showcase for the songs that would have taken part in the competition.