Artists With the Most Radio Songs No. 1s in the 21st Century
Billboard’s electronically-monitored Radio Songs chart dates back to the Dec. 8, 1990, print issue. “Billboard this week introduces the Top 40 Radio Monitor, a new airplay-only chart that provides actual monitored airplay data on top 40/pop stations,” announced a story on page 4 that week. “The chart uses a new technology [that] tracks airplay of […]
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