Conversation so far:
What kind of music did Al Capone listen to
According to Jack Woodford, piano player to Chicago’s 1920s gangland, there was only one song that Al Capone ever really wanted to hear ‘Roses of Picardy.’
Where is the song 'Roses of Picardy' originally from
Roses of Picardy, a British ballad from 1916. Legend says it was written by a lovesick officer at the French Front when watching a widow plant roses in her garden
Did the song 'Roses of Picardy' become famous
Roses of Picardy was the biggest hit of 1916. It sold 50,000 copies every month in Britain until the end of the Great War.

Question: Sang by whom
Self-contained rewrite: Who sang The song 'Roses of Picardy’