Kim Hye Yeon's powerful, passionate voice has made for some of the most memorable trot songs of the ‘90s, the kind that have become modern standards and karaoke favourites. While the vibrato-laden pentatonic scale melodies she sings are classic, her best-known songs update the genre by finding the common ground between trot's two-step rhythm and techno's thumping beats, with some whirling disco strings thrown in for good measure.