After signing on with J.Y. Park's JYP Entertainment agency, singer Park Ji Yoon made her mark on K-pop with sexy bangers like 2002's “I'm a Man.” That early hit epitomized her impresario's songwriting style, with its breathy falsetto melodies and ‘90s-R&B production. In her post-JYP career, she's matured as an artist in her own right, making piano-driven adult contemporary tracks like “Tree of Life” (plus the occasional funky jam like “Beep”) that showcase the development of her voice.