“SQUARE UP” is the first Korean extended play by South Korean girl group BLACKPINK. It was released on June 15, 2018 by YG Entertainment. It is available in two versions and contains four tracks, with “DDU-DU DDU-DU” released as the lead single. Upon its release, “SQUARE UP” debuted at the top spot of the Gaon Albums Chart and went on to sell almost 179,000 copies on its first fifteen days of release in South Korea. The EP also debuted at number 40 on the US Billboard 200.