This document discusses how classical music became popular and influenced other genres of music. It provides examples of classical musicians performing crossover concerts combining classical and popular music genres like jazz, rock, and folk. The document also discusses the golden era of Philippine ballads from the 1980s-1990s created by artists like Ryan Cayabyab, George Canseco, and Willie Cruz. It notes how Filipino artists like Oggie Alcasid and Sharon Cuneta achieved success in the Manila Sound era by releasing popular hit songs that blended classical and pop styles.