Singer Ock Joo-hyun sings a duet with the AI version of the late Kim Kwang-seok. South Korea has used AI to bring a dead superstar's voice back to the stage, but ethical concerns abound Updated 9:34 PM ET, Mon January 25, 2021 Seoul (CNN)For the first time in 25 years, the distinctive vocals of South Korean superstar Kim Kwang-seok will be heard on national television singing new material. It's a feat made all the more extraordinary because the famous folk singer is dead. National broadcaster SBS plans to use artificial intelligence (AI) to bring Kim's voice back to life on a new program, "Competition of the Century: AI vs Human," to air later this week.