5x20 All the Best!! 1999–2019 (stylized as 5×20 All the BEST!! 1999–2019) is the fifth greatest hits album by Japanese boy band Arashi. It was released through J Storm on June 26, 2019. The album debuted at the top spot of the Oricon Weekly Albums chart, selling 1,304,251 copies in its first week of release in Japan. It spent the most weeks at number one of any album on the Oricon Albums Chart in 2019, with four, and was both the best-selling album of 2019 in Japan, as well as worldwide, with 3.3 million copies sold, eventually becoming the world's best-selling album of the year for 2019. Background 5x20 All the Best!! 1999–2019 is Arashi's fifth greatest hits album, following Arashi Single Collection 1999–2001 (2002), 5x5 The Best Selection of 2002–2004 (2004), All the Best! 1999–2009 (2009), and Ura Ara Mania (2012). It contains all 56 singles released by the band between 1999 and 2018, plus a new song, "5x20". Included in a limited edition is a live video collection spanning the band's career. On January 27, 2019, the band announced that it would cease all group activities after December 31, 2020. In a press conference on the same day, member Jun Matsumoto expressed interest in releasing a 20th anniversary best-of album and a video collection. Arashi announced the album on May 3, 2019, via Yomiuri Shimbun. Release and promotion The album was released on June 26, 2019, in three editions: a four-disc CD regular edition, and two 4CD/1DVD limited editions. Limited edition 1 contains a DVD with the music video and making-of for "5x20". Limited edition 2 contains a DVD called "Arashi Live Clips", which contains selected video clips from previously released live concert videos. Pre-orders became available on May 8. By May 29, the majority of CD shops and online stores had sold out of its allocation of pre-orders and it was discovered that the album was being resold for higher than its suggested retail price. In response, J Storm arranged for additional production of the limited editions, available for pre-order from June 1 to July 12, to be shipped mid-August. Arashi appeared on NHK's Songs, TV Tokyo's TV Tokyo Music Festival, TBS's Ongaku no Hi NTV's The Music Day, and Fuji TV's FNS Music Fes. in Summer. On July 1, 2021, member Kazunari Ninomiya appeared on video on their SNS promoting the digital release of the album