21 was atop the UK Albums Chart for 50 weeks.
In January 1989, all the various artist compilation albums were removed from the Top 100 albums chart and given their own Top 20 chart (found in Music Week and Record Mirror), with the main albums chart reformatted as a top 75 (as far as hit albums are concerned) to equal the singles chart
 Also in 2020, Kylie Minogue became the first female solo artist to have UK number-one albums in five different decades (which also happened to be consecutively, the 1980s, 1990s, 2000s, 2010s, and 2020s), with her eighth UK number-one album Disco

