This bubble chart shows the distribution of singers in the 50 most popular songs from 1950 to 2024, classified by different score ranges, reflecting the hierarchical differences in singers' popularity. As can be seen from the figure, the number of singers in the 85-point range is the largest, indicating that the popularity of most singers is concentrated in this score range. The number of singers in the 89-point range is the smallest, indicating that singers in this score range usually have a higher industry status.