Blackpink (Korean: 블랙핑크; RR: Beullaekpingkeu, stylized in all caps or as BLɅϽKPIИK) is a South Korean girl group formed by YG Entertainment, consisting of members Jisoo, Jennie, Rosé, and Lisa. Dubbed the "biggest girl group in the world", they are regarded as the most successful Korean girl group internationally and one of the leaders of the Korean Wave. They are stylistically associated with the "girl crush" concept in K-pop—exploring themes of self-confidence and female empowerment. Blackpink debuted in August 2016 with their single album Square One, which featured "Whistle" and "Boombayah", their first number-one entries on South Korea's Gaon Digital Chart and the US Billboard World Digital Songs chart, respectively. It was followed by the single album Square Two in November, whose song "Playing with Fire" was the first by a Korean girl group to enter the Billboard Canadian Hot 100. The group expanded their global reach with "Ddu-Du Ddu-Du" (2018), which was the first song by a Korean female group to enter the UK Singles Chart and receive a certification in the United States. Its music video was the first by a Korean group to surpass one and two billion views on YouTube, and remains the most-viewed by a Korean group to date. Blackpink's 2018 song "Kiss and Make Up" was the first by a Korean group to receive a certification in the UK and a platinum certification in Australia. Their music videos for "Kill This Love" (2019) and "How You Like That" (2020) each set records for the most-viewed music video within the first 24 hours of release, with the latter breaking five Guinness World Records.