CNBLUE is a South Korean rock band formed in 2009. The group consists of four members: Jung Yong-hwa, Lee Jong-hyun, Kang Min-hyuk, and Lee Jung-shin. They are known for their unique blend of rock and pop music, and they gained popularity for their catchy songs and energetic performances. The band debuted with their first mini-album, "Now or Never," and quickly rose to fame in South Korea and internationally. CNBLUE has released several successful albums and singles, showcasing their musical talent and versatility. They are also recognized for their involvement in songwriting and composing, contributing to their distinct sound.