BOL4 (), also known as Bolbbalgan4 or , is a South Korean musical act formed by Shofar Music in 2016. They appeared on ''
Superstar K6'' in 2014 before signing a contract with their current agency. BOL4 was originally a duo consisting of
Ahn Ji-young and Woo Ji-yoon. They debuted with the single "Fight Day" from the mini-album ''Red Ickle'' on April 22, 2016. The group's name in English comes from the first syllable of the Korean word
("puberty"), which is pronounced the same as the
Sino-Korean numeral four (
).
The duo went on a temporary hiatus due to Ahn's music classes requirements in the first half of 2018. BOL4 signed with
King Records and debuted in Japan on June 5, 2019, with the mini-album ''Red Planet (Japan Edition)''.
On April 2, 2020, Shofar Music announced that Woo Ji-yoon had left the duo and that Ahn Ji-young will continue to promote as BOL4 as a solo act.
Formation
Ahn Ji-young and Woo Ji-yoon were both raised in
Yeongju
Yeongju (; ) is a city in North Gyeongsang Province, South Korea. It has an area of 668.84 km2 and a population of 113,930 people according to the 2008 census. The city borders Bonghwa county to the east, Danyang County of North Chungcheong Pr ...
,
North Gyeongsang Province
North Gyeongsang Province (, ) is a province in eastern South Korea, and with an area of , it is the largest province in the Korean peninsula. The province was formed in 1896 from the northern half of the former Gyeongsang province, and remaine ...
, and were classmates. They had previously competed on ''Superstar K 6'' in 2014. Since they were young, they had dreamed of becoming singers. The name of their duo was chosen because they wanted to make the kind of pure, honest music that can only be found in adolescence. Woo portrays the "blushing" part of the name because she is often shy, while Ahn portrays "youth" because she acts like an adolescent girl.
Members
Current
* Ahn Ji-young () – main vocals
Former
* Woo Ji-yoon () – guitar, rapping, backing vocals
Discography
Studio albums
Extended plays
Singles
As lead artist
Collaborations
As featured artist
Soundtrack appearances
Other charted songs
Concert and tours
Headlining concerts and tours
* BOL4 1st Solo Concert "Red Planet" (2016)
* BOL4 1st Concert in Taipei (2017)
* BOL4 2nd Solo Concert "Imagine" (2017-2018)
* BOL4 3rd Solo Concert "Travel" (2018)
* 2019 BOL4 Spring Solo Concert "Flower Energy" (2019)
* 2019 BOL4 Asia Tour "Blossom" (2019)
* 2019 BOL4 Tour Concert "Two Five" (2019)
* BOL4 Japan Live Tour 2020 "Love" (2020)
* BOL4 Concert "Seoul" (2022)
* 2023 BOL4 Concert in Taipei (2023)
* BOL4 Concert "Love.zip" (2023)
* 2023 BOL4 Asia Tour "Love.zip" (2023)
* 2024 BOL4 Concert "Bloom" (2024)
* 2025 BOL4 Asia Tour "Bloom" (2025)
BOL4 1st Solo Concert "Red Planet" (2016)
BOL4 1st Concert in Taipei (2017)
BOL4 2nd Solo Concert "Imagine" (2017-2018)
BOL4 3rd Solo Concert "Travel" (2018)
2019 BOL4 Asia Tour "Blossom"
2019 BOL4 Tour Concert "Two Five"
BOL4 Live Tour 2020 "Love"
BOL4 Concert "Seoul" (2022)
2023 BOL4 Asia Tour "Love.zip"
Showcase
* BOL4 1st Live Showcase 宇宙をあげる～ (2018)
Videography
Music videos
Filmography
Television shows
Awards and nominations
Notes
References
External links
*
{{Authority control
South Korean pop music groups
K-pop music groups
Musical groups established in 2016
South Korean girl groups
2016 establishments in South Korea
South Korean musical duos
Korean Music Award winners
Melon Music Award winners
Pop music duos
Female musical duos