Billboard began an album chart in 1945. Initially only five positions long, the album chart was not published on a weekly … See more

Billboard's "chart year" runs from the first week of December to the final week in November. This altered calendar allows for Billboard to calculate year-end charts and release them in time for its final print issue in the last … See more

• As a musician, Paul McCartney has the most number-one albums, with 27. This includes 19 albums from his work with the Beatles, three solo albums and five albums as a part of his 1970s group Wings. John Lennon is … See more