2006 had the most different number-one songs of the decade. It had 18 different number ones. That total would have been ...

For the chart's 35th anniversary, we review all of the chart's year-end No ... Hot Rap Songs switched to an airplay-only ranking in June 2002 amid the declining number of physical single releases.

The ten worst number-one hits of the 1960s ... Frank Sinatra recorded the song later that year and showed what a real singer ...