Eurovision Song Contest's Greatest Hits (also known as Eurovision's Greatest Hits) was a live television concert programme organised by the European Broadcasting Union (EBU) and produced by the British Broadcasting Corporation (BBC) to commemorate the Eurovision Song Contest's 60th anniversary. The concert took place on 31 March 2015 at the Eventim Apollo, in Hammersmith, London. Guy Freeman was the executive producer and Geoff Posner the director, both of whom held the same positions as the last time the BBC hosted the Eurovision Song Contest in 1998. Simon Proctor was the senior producer and David Arch was the musical director for the concert. Tickets for the event went on sale at 10 am on 6 February 2015. Graham Norton and Petra Mede hosted the event, which saw fifteen acts from thirteen countries performing their Eurovision entries from yesteryear. During the televised show, video montages for some of the Eurovision Song Contest archives were shown in-between each live performance. The United Kingdom entry for the Eurovision Song Contest 2015 was performed at the concert, but never broadcast on the televised show. Riverdance performed a reprise of their 1994 Eurovision Song Contest interval act as part of the anniversary celebrations. Several countries confirmed that they would air the delayed broadcast of the concert on various dates that suited the broadcasters scheduling, including Australia, who first competed in the Eurovision Song Contest 2015 as a wildcard entry. The host broadcaster, BBC, and Raidió Teilifís Éireann (RTÉ), simulcast the show on Good Friday, 3 April 2015 across BBC One and RTÉ 2. The Dutch broadcaster, AVROTROS, were the first to announce their decision to not broadcast the event. Other countries also announced their decision to decline broadcasting the event, including Luxembourg, who had an act taking part in the event.