it's Big bang

G-Dragon

권지용

Kwon Ji-Yong (born August 18, 1988), better known by his Stage name G-Dragon, is a South Korean singer and song-writer. A trainee under the record label YG Entertainment for six years, G-Dragon officially debuted as the leader and one of the two rappers for the Korean hip-hop group Big bang. Since their debut, G-Dragon has involved himself with the production of their albums: he composed and wrote several tracks by himself, including "Lies," "Last Farewell," and "Haru Haru."

During the hiatus of Big Bang, G-Dragon released his debut solo album, Heartbreaker (2009), which went on to become one of the most successful albums of the year, garnering sales of over 120,000 copies. The album sparked major controversies for the artist, including accusations of plagiarism; however, all accusations have been dropped.

T.O.P

최승현

The "Big Brother" of the band is Choi Seung Hyun (최승현), also known as Tempo or T.O.P. YG's staff calls him Keun Seung Hyun, meaning Big Seung Hyun, to distinguish between the two Big Bang members named Seung Hyun. Before joining Big Bang, he performed in clubs and even won KBS Radio's "Rap Battle" in 2003. Tempo is one of the two rappers in the Big Bang and is also very talented in beat-boxing. Recently, TOP has successfully finished filming his role as the school's top fighter in a Korean drama called, I Am Sam. His character's name in the drama was Chae Mu Shin and his talent as an actor has impressed the fans and the viewers as well.

When asked what age difference between him and his potential other would be, he wrote the symbol for infinity

 As of 2009, T.O.P. is acting in Korean drama IRIS as a cold-hearted assassin Vic. 

Seungri

승리

Lee Seung-hyun, known by his stage name Seungri (lit. victory), is a member of Korean group Big Bang. Before joining the group, he was a member of a dance team in Gwangju. He first appeared on television on the reality television series Let's Cokeplay: M.Net Battle Shinhwa, a show in which Shinhwa attempted to create a boy band that could be a "second Shinhwa".Although he was noticed for his dance skills, his lack of vocal skills led to him being eliminated. He was later scouted by the record label YG Entertainment and joined the group Big Bang. Although he was initially cut on the ninth episode of the group's documentary series, he was given another chance to impress YG Entertainment CEO Yang Hyun Suk and succeeded.

Seungri is known for his dance skills. In his hometown, Gwangju, he was part of the dance group II Hwa.He has competed against his fellow Big Bang member Taeyang in several dance competitions, as well as against Super Junior's Eunhyuk, TVXQ's Yunho, and Shinee's Taemin. Seungri also choreographed some of Big Bang's dance.

After passing the college entrance exams, Seungri was accepted into Chung-Ah Nuniversity and began his college education in spring 2010, along with Yuri and Sooyoung of Girls' Generation.

Taeyang

동영배 | 태양

Dong Young-bae (Hangul: 동영배, Hanja: 董永培, born May 18, 1988), better known by his stage name Taeyang (Hangul: 태양, Hanja: 太陽, meaning sun) or Sol, is a South Korean singer. After appearing in Jinusean's music video "A-yo", Taeyang began training under YG Entertainment at the age of 12 alongside fellow member and leader G-Dragon. After six years of vocal and dance training he made his debut in 2006 as a member of Bigbang. In 2008, Taeyang released his debut mini-album Hot. On July 1, 2010, he released his first full-length album title

Taeyang's first appearance in the entertainment industry was in the hip-hop group Jinusean's music video "A-yo". The collaboration eventually lead him to successfully auditioning into the group's record label YG Entertainment, where he became one of the rappers alongside fellow trainee G-Dragon. The two were later coined as GDYB. In 2003, Dong provided the rap verse in singer Wheesung’s single "Player" on the latter's second album.

Daesung

 대성

Daesung (born Kang Daesung on April 26, 1989) is a member of South Korean hip hop group Big Bang. Since his debut, he has released solo singles, performed in musicals, and became a member of reality-variety series Family Outing

Although his parents were against the idea of him becoming a singer, Daesung pursued a career as a singer and was eventually recruited by YG Entertainment after auditioning. He later appeared on a documentary show following the potential members of what eventually became Big Bang.

Their first appearance as a group was on August 19, 2006 at YG Family's 10th Anniversary concert. On September 23, 2006, they had their debut performance. The group had its first big hit with "Geojitmal" (Korean: "거짓말", "Lies") in 2007.