Stayin' Alive in the Wall. Top Hits of Years. Billboard Year-End Hot 100 chart for 2001.
Note that from from 1950 to 1955, Billboard compiled only top 30 charts. What is now the Hot 100 existed for nearly fifteen years as numerous charts, tracking and ranking the most popular singles the day in several areas. The methods and policies by which this data is obtained and compiled have changed many times throughout the chart's history. Billboard has also changed its Hot 100 policy regarding "two-sided singles" several times. During periods in which singles sales were strong, the Hot 100 allowed both sides a single (A-side and B-side) to chart together (occupying the same position), provided that both sides were receiving significant radio airplay.
Recognized Songs. Youtube to MP3.