Justin Bieber's "Beauty and a Beat" is the biggest song in the world, rising a spot to No. 1 on the Billboard Global 200 chart. "Billie Jean" by Michael Jackson is in the top 10. BTS? Swim rises 3-2 after spending its first four weeks on the chart at No.1. Olivia Rodrigo's "Drop Dead" falls to No 3 a week after it debuted in the number one spot.