Question: Which Korean artist is younger: Moon Hee-joon or Bada?
Related documents: [0]  [DOC] Moon Hee-joon (; or spelled Moon Hee-jun; born March 14, 1978) is a South Korean pop-rock singer-songwriter signed under SidusHQ. He initially rose to fame as the leader of former boy band H.O.T. under SM Entertainment. [END] 
[1]  [DOC] Choi Sung-hee (born February 28, 1980), better known as Bada or Sea, is a South Korean singer and musical actress. She is a member of South Korean girl group S.E.S.. She has released four studio albums, one mini albums and five singles. She won Best Actress at the 3rd The Musical Awards and has starred in ten musicals to date. [END] 
Answer: 
Bada
Bada