1) A czech thrash metal band founded in 1989 and released a few full-length albums. 2) Brian Gintaek Joo (브라이언) (born January 10, 1981) is an American singer active in South Korea, where he is known as a member of R&B duo Fly to the Sky. He is professionally known as Brian. Brian entered the local pop music scene in 1999, at the tender age of 17. Born and raised in the United States, Brian entered the Korean entertainment industry after a friend signed him up for an audition with Brothers Entertainment and was then sent to SM Entertainment in Korea.