Few artists move as fluidly across music and television as IU, who also goes by her given name, Lee Ji-eun. An all-rounder by any measure, her career has long defied easy comparison. Since the 2010 breakout hit “Good Day” crowned her the nation’s “little sister,” the 32-year-old has remained a constant presence in South Korea’s cultural conversation. Her albums and shows reliably dominate headlines, and she stands among the rare K-pop singer-songwriters who consistently command music charts. In