Constance Grady (via Vox) explains how Mariah Carey’s “All I Want for Christmas,” which was released 25 years ago, finally reached #1 on Billboard’s official Hot 100 chart. (Here is the official announcement.) In brief, Mariah’s Christmas anthem was originally ineligible for the Hot 100 chart because it was first released as a noncommercial single, but then “a series of rule changes (older songs were ineligible until they weren’t; noncommercial singles were ineligible until they weren’t) pushed ‘All I Want’ on and off the Billboard charts every holiday season … until in 2017, it hit No. 9 on the Hot 100 and entered the top 10 for the first time. In 2018, it hit No. 3. Now, two years later and more acclaimed than ever thanks to its 25th anniversary, it’s finally reached No. 1 on the chart.” Enjoy … and Merry Christmas!