The New York City and Seoul-based producer Kathy Yaeji Lee makes house music and pop tunes, but her vocal delivery often sounds like rap. In past songs, like “Guap” or “Last Breath,” with hard 808s, she flashed a unique flow that showed precision in both English and Korean. For her new track, “Drink I’m Sippin On,” Yaeji embraces her inclination toward the style and trades in her usual four-on-the-floor for a trap beat.