Heo Jun
YB, formerly known as Yoon Do-hyun Band (), is a South Korean rock band. Formed in 1996, the band consists of Yoon Do-hyun (lead vocals, keyboard, guitar), Heo Jun (guitar, keyboard), Kim Jin-won (drums), Park Tae-hee (bass guitar) and Scott Hellowell (guitar). YB rose to major popularity and success during the 2002 World Cup, and once again in 2011 through appearing in the Korean TV show "I Am a Singer". They have performed across the world and regularly headline major rock festivals in South Korea.