A 90s hit that defined radio airplay When people think of 1990s music, they often picture grunge bands, hip-hop pioneers, or pop icons dominating the charts. But radio airplay tells a different story—one shaped by crossover appeal and repeat-friendly hits. Why “Smooth” dominated 90s radio stations Released in 1999, Smooth became one of the most successful crossover hits in modern music history. It reached massive audiences across multiple radio formats, including pop, rock, and adult…