Subscriber Account active since. In the history of modern music rankings, only a handful of songs have ever debuted at No. The Hot is widely considered the definitive all-genre singles chart in the US. Although it was officially launched in , Billboard began using modern airplay and sales data in — allowing for more time-sensitive calculations and accurate rankings. Moreover, Billboard began incorporating digital sales data in and YouTube data in The chart methodology is updated at least once a year , to reflect rapidly evolving listening trends. Although more than 1, songs have reached the coveted No.
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2. "Fantasy" by Mariah Carey
The Billboard Hot is the music industry standard record chart in the United States for songs, published weekly by Billboard magazine. Chart rankings are based on sales physical and digital , radio play , and online streaming in the United States. The weekly tracking period for sales was initially Monday to Sunday when Nielsen started tracking sales in , but was changed to Friday to Thursday in July This tracking period also applies to compiling online streaming data. Radio airplay, which, unlike sales figures and streaming, is readily available on a real-time basis, is tracked on a Monday to Sunday cycle previously Wednesday to Tuesday. As of the issue for the week ending on August 29, , the Billboard Hot has had 1, different number one entries. Prior to , Billboard ' s lead popularity chart was the Honor Roll of Hits , established in This chart ranked the most popular songs regardless of performer based on record and sheet sales, disk jockey, and juke box performances as determined by Billboard ' s weekly nationwide survey.
The Billboard charts tabulate the relative weekly popularity of songs and albums in the United States and elsewhere. The results are published in Billboard magazine. Billboard biz, the online extension of the Billboard charts, provides additional weekly charts,  as well as year-end charts. The charts can be ranked according to sales, streams, or airplay, and for main song charts such as the Hot song chart, all three data are used to compile the charts. The weekly sales and streams charts are monitored on a Friday-to-Thursday cycle since July ; previously it was on a Monday-to-Sunday cycle.