Toni Fisher was an American pop singer, best known for her hauntingly unique 1960 song "The Big Hurt," which pioneered the use of phasing (an audio effect that alters the sound of musical instruments or vocals). Her style leaned towards pop and ballads, characterized by her distinctive, emotive vocals. While her career was brief, Fisher's innovative use of technology in music production significantly impacted the pop genre. Despite a relatively limited discography, her contribution to the evolution of sound effects in music recording remains her lasting legacy in music history.