BTS sold nearly 3 million physical copies of "Butter" in 2021

K-pop group, BTS, has sold nearly three million physical copies of their song "Butter" in 2021, thus becoming the best seller in South Korea.

Today Gaon Music Chart – the South Korean equivalent of the Billboard charts – released its year-end album chart for 2021, detailing the best-selling physical releases for that year. BTS took first place with "Butter", which sold nearly three million copies in South Korea alone, writes nme. 

Meanwhile, the song of the Korean star IU, "Celebrity" has emerged as the most popular in South Korea, with over 888 million.