Jeong soon-won (born march 26, 1974), better known by his stage name the one is a south korean singer and vocal coach. Singing voice teacher music education list of vocal coaches master class. south korean singer, rapper, and songwriter, psy, is known internationally for his hit single gangnam style. The music video for the song became the first video to exceed one billion views on youtube and continues to be one of the most viewed videos on the platform. former wanna one singer ong seongwu is a man of many talents in the korean entertainment industry.