승희 (CLC) – Once Again
Track 02 from EP "시간의 멜로디 OST"
Release Date: 2022.01.14
육성재 (비투비), 승희 (CLC) – 궁금해
Track 01 from Single "아홉수 소년 OST Part 4"
Release Date: 2014.09.25
승희 (CLC), 예은 (CLC) – 오빠 나빠요
Track 01 from Single "국민 여러분! OST Part.3"
Release Date: 2019.04.22
승희 (CLC) – 나의 사랑, 운명, 이유
Track 03 from Album "펌킨타임 OST"
Release Date: 2021.12.17
김보형, 승희 (CLC) – 엄마
Track 03 from Single "아이돌보컬리그 - 걸스피릿 EPISODE 06"
Release Date: 2016.08.24