TWICE, a South Korean girl group formed by JYP Entertainment through the 2015 reality show Sixteen. The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu.

The group debuted on October 20, 2015, with the extended play (EP) The Story Begins. TWICE rose to fame in 2016 with their single "Cheer Up": the song charted at number 1 on the Gaon Digital Chart and became the best-performing single of the year. It also won "Song of the Year" at two major music awards shows—Melon Music Awards and Mnet Asian Music Awards. Their subsequent single "TT", from their third EP TWICECOASTER: Lane 1, claimed the top spot for four consecutive weeks. The EP was the highest selling K-pop girl group album of 2016.

The group made their debut in Japan on June 28, 2017, with the release of their first compilation album titled #Twice. The album debuted at number 2 on the Oricon Albums Chart, which sold over 136,000 copies within seven days, the highest first week album sales of a KPOP artist in Japan in two years. With over 250,000 unit sold for 2 Japan album, TWICE became the first Korean girl group that earned Platinum certification for both album and CD single in the same year. In 2018, they released their fifth EP, What Is Love? with the single of the same name produced by Park Jin-young. Their second headline tour Twice 2nd Tour: Twiceland Zone 2 – Fantasy Park began in Seoul on May 18–20. The concert tour attracted over 90,000 fans in six cities across Asia.