Short answers, pulled from the story.
WAP by Cardi B featuring Megan Thee Stallion was the first number-one song on the Billboard Global 200, reaching the top spot on the chart dated the 19th of September 2020. This song claimed the number-one position on the chart that officially premiered on the 15th of September 2020 for the tracking week ending the 19th of September 2020.
The Billboard Global 200 calculates rankings using sales and streaming data from more than 200 territories with a weighted formula that values premium subscription streams higher than ad-supported streams. One track sale equals 200 premium streams which in turn equals 900 ad-supported streams creating a ratio of 4.5 to 1 between ad-supported and premium streams.
South Korean boy band BTS holds the record for the most number-one songs on the Billboard Global 200 with seven number-one songs. BTS was also the first act to top the Global 200, Global 200 Excl. US, and Hot 100 charts simultaneously with their song Dynamite on the 3rd of October 2020.
The Billboard Global Excl. US is a companion chart that follows the exact same formula as the main Global 200 but excludes all data from the United States. This chart effectively creates a mirror that shows what is popular in the rest of the world without American influence and launched alongside the main Global 200 on the 19th of September 2020.
All I Want for Christmas Is You by Mariah Carey spent 20 weeks at number one on the main Billboard Global 200 chart. The song also achieved the biggest single-week downward movement on the chart dropping from number one to 186 on the 15th of January 2022 and from 1 to 167 on the 14th of January 2023.
Taylor Swift has the most number-one singles on the Billboard Global 200 Excl. US chart with four songs. She was also the first female artist to top the Global 200, Global 200 Excl. US, and Billboard 200 charts simultaneously with four different songs and their parent albums.