The crossword solution for the term 'You Might Have One In Your Heart' is SONG. A SONG is a musical composition that is typically intended to be sung by the human voice with distinct and fixed pitches and patterns using sound and silence. Songs are often used to express emotion, tell stories, and communicate ideas. They can be performed solo or with a group of singers and musicians. Popular genres of songs include pop, rock, country, folk, jazz, and classical.