Kitty Kallen was an American popular singer known for her versatile vocal style, ranging from big band to traditional pop music. She gained prominence in the 1940s and 1950s, working with notable bandleaders like Harry James and Jack Teagarden. Kallen's signature sound is epitomized in her 1954 chart-topping hit "Little Things Mean a Lot," which showcased her warm, emotion-laden vocal delivery. Her influence in the mid-20th century music scene significantly contributed to the evolution of popular music.