Which South Korean singer/actress was a member of both DIA and I.O.I?
Jung Chae-yeon Jung Chae-yeon (born December 1, 1997), better known by the mononym Chaeyeon, is a South Korean singer and actress. She is best known for being a member of the South Korean girl group DIA, and for finishing 7th in the survival show "Produce 101", making her a member of I.O.I.
Kim Ki-bum Kim Ki-bum (born August 21, 1987) is a South Korean actor and singer. He was a member of the South Korean boy band Super Junior. After the release of Super Junior's third studio album "Sorry, Sorry" in 2009, Kim announced his leave from the group to pursue his acting career. In 2015, Kim announced he ended his contract with S.M. Entertainment and departure from the group. Kim made his television debut in the Korean television drama, "April Kiss", in 2004.