Hot Digital Tracks
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The Hot Digital Tracks is a song popularity chart that ranks the best selling digital tracks in the United States according to Billboard magazine. It is not to be confused with the Hot Digital Songs chart, which combines different versions of songs for a summarized figure (for example remixes, "explicit" or "clean" versions, and/or any other alternate versions can chart separately here, whereas all versions of the same track occupy only one position on Hot Digital Songs).
The Hot Digital Tracks was created in 2003, but its data would not be used as a component for compiling the Billboard Hot 100 until February 2005. The current #1 is Beyoncé's "Irreplaceable".