Discovering a Hidden Gem in K-pop: Ha Hyun-woo While listening to my favorite Korean music today, I felt inspired to write a post about K-pop. There are countless famous K-pop stars and artists out there, but I thought it would be nice to introduce some lesser-known yet incredibly talented singers. Today’s featured artist is Ha Hyun-woo, the frontman of the Korean band Guckkasten. He is the band’s leader, vocalist, and guitarist.