Sven-Olof Walldoff ( 2 May 1929 – 7 June 2011 ) was a Swedish record producer , composer and orchestra conductor who is best known for conducting the orchestra for ABBA 's song " Waterloo " for the Eurovision Song Contest 1974 , wearing a Napoleon costume
Eurovision Song Contest 1974
Eurovision Song Contest 1974
Sven-Olof Walldoff