Akdong Musician (Hangul: 악동뮤지션) is a South Korean band, consisting of siblings Lee Chan-hyuk (Hangul: 이찬혁) and Lee Soo-hyun (Hangul: 이수현). They are known as the winners of the second installment of the K-pop Star series. Lee Chan-hyuk Instruments: acoustic guitar, lead vocals, backing vocals Born on 12 September 1996, Chan-hyuk is the group's lyricist and arranger, as well as provides vocals to their songs. Lee Soo-hyun Instruments: lead vocals, backing vocals