Chad Vaccarino is a musician and songwriter best known as one half of the pop duo A Great Big World. He gained fame with the hit song "Say Something," which features Christina Aguilera and topped charts worldwide. The duo's music often blends pop and indie elements, showcasing emotional lyrics and harmonies. In addition to his work with A Great Big World, Vaccarino has collaborated with various artists and contributed to soundtracks for films and television. His career reflects a commitment to creating heartfelt music that resonates with audiences, earning him recognition in the contemporary music scene.