Riverdance from the packed theatre of 4,000 people. The performance is often considered the most well known interval act in Eurovision Song Contest history. Riverdance was later performed as an interval act at both the "" (2005) and "Eurovision Song Contest's Greatest Hits" (2015) events. Lead dancers Michael Flatley and Jean Butler transformed the previously chaste and reserved traditional dance form into something else entirely. The song "Riverdance" was released as a single and entered the Irish Singles Chart at No. 1 right after the Eurovision debut, staying there for 18 weeks—the longest amount of time a song has ever topped
Riverdance and in smaller venues. Current productions are geared towards smaller theatres, whereas past productions have been performed in large theatres and arenas. Sets have therefore been simplified and some numbers contain fewer performers than in past productions (such as those seen on the Live from New York City (1996) and Live from Geneva (2002) DVDs). Each production company is named after an Irish river: Liffey, Lee, Lagan, Avoca, Shannon, Boyne, Corrib, Foyle, Moy and Bann. On 21 July 2013, a record was set when a line of 1,693 dancers from 44 countries danced to "Riverdance" on a bridge overlooking the