While Fitzgerald appeared in movies and as a guest on popular television shows in the second half of the twentieth century, her musical collaborations with Louis Armstrong, Duke Ellington, and The Ink Spots were some of her most notable acts outside of her solo career. These partnerships produced some of her best-known songs such as "Dream a Little Dream of Me", "Cheek to Cheek", "Into Each Life Some Rain Must Fall", and "It Don't Mean a Thing (If It Ain't Got That Swing)".