JTBC announced the 81 finalists for Sing Again 4: Battle of the Unknown on October 1, 2025.
The program, hosted by Lee Seung-gi and judged by Kyuhyun, Taeyeon, Lee Hae-ri, Code Kunst, and Lim Jae-beom, premieres on October 14, 2025, offering second chances to contestants who have released at least one song through cover performances and hearing their backstories.
The show continues its tradition since 2020 of spotlighting unknown talents across genres, genders, and nationalities. Meanwhile, the 81 finalists who have advanced to the main stage have been revealed, and they are intriguing.
The finalists features overlooked vocalists including current and former idols Zuu from Secret Number, Jaehan from OMEGA X, Jiham from A.C.E and Kriesha Chu, as well as indie artists and R&B singers. From No. 1 to No. 81, what stories led them to knock on the door of Singer Gain 4?
The production team of Sing Again 4 said, "In season 4, many of the 'Singer Gain Kids' who have nurtured their dreams and skills as singers through 'Singer Gain' will participate and show an amazing performance," and "You will also be able to discover the raw charm of 'truly unknown' singers who have never had a chance to be exposed to the media, as well as new, talented unknown singers," raising expectations. Meanwhile, JTBC's Sing Again 4 is scheduled to air on October 14 at 10:30 PM.