The crossword solution for the term 'Goodnight Girl of Song' is Irene. Irene is a popular song written by Harry Von Tilzer in 1905. It was originally recorded by the American singer and vaudeville performer, Ada Jones. The song became a hit and was later covered by many other artists, including Bing Crosby and Elvis Presley. The lyrics of the song tell the story of a young woman named Irene who is saying goodbye to her lover as he leaves for war. The song has become a classic and is still widely known today.