[Nicky91]

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On April 26, BTS held a one-hour livestream countdown featuring a melting cube of butter. At the end of the countdown, it was revealed that they were releasing their second English-language single, "Butter", on May 21. Its music video broke the record for the biggest YouTube premiere of all time, garnering 3.9 million concurrent viewers, and became the most viewed YouTube video on its first day, with 108.2 million views. "Butter" debuted at number one on the US Billboard Hot 100 chart, marking the group's fourth number one in the last nine months, making them the quickest act to reach four number ones since Justin Timberlake a decade-and-a-half ago and the fastest group to score four number ones since the Jackson 5 in 1970. On June 16, 2021, BTS, the Best, the group's sixth compilation album, sold 572,000 copies, breaking SixTones' record of 467,000 copies to become Japan's greatest-selling record in a week. On June 28, "Butter" became the group's longest running #1 debut in Hot 100 history, breaking the 23-year record held by Aerosmith's "I Don't Want to Miss a Thing" (1998). On July 9, they released their third English-language single, "Permission to Dance". On July 19, "Permission to Dance" became their fifth consecutive No. 1 on the Hot 100 chart in 10 months and two weeks, making it the fastest accumulation of a quintet of leaders since Michael Jackson more than three decades ago.

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