The crossword solution for the term 'Good Night Girl of Song' is Irene. Irene is a popular song written by Harry Von Tilzer in 1905. The song was originally written as a vaudeville tune and has since been covered by many artists, including Bing Crosby, Elvis Presley, and Frank Sinatra. The lyrics of the song tell the story of a young girl named Irene who is saying goodbye to her sweetheart as he goes off to war. The song has become a classic and is still sung today.