홍자 – 깍쟁이
Track 01 from EP "Come Back Hong Ja"
Release Date: 2018.06.07
홍자 – 눈물의 술잔
Track 01 from EP "술잔"
Release Date: 2021.04.29
홍자 – 상사화
Track 20 from Album ""FOREVER" [Goodbye 진선미]"
Release Date: 2020.11.21
홍자 – 비나리
Track 19 from Album ""FOREVER" [Goodbye 진선미]"
Release Date: 2020.11.21
홍자 – 열애
Track 18 from Album ""FOREVER" [Goodbye 진선미]"
Release Date: 2020.11.21
홍자 – 사랑참
Track 17 from Album ""FOREVER" [Goodbye 진선미]"
Release Date: 2020.11.21
홍자 – 열애
Track 08 from Album "미스트롯 FINAL STAGE"
Release Date: 2019.05.02
홍자 – 여기요
Track 01 from Album "미스트롯 FINAL STAGE"
Release Date: 2019.05.02
홍자 – 상사화
Track 08 from Album "미스트롯 DEATH MATCH"
Release Date: 2019.03.30
홍자 – 비나리
Track 01 from Album "미스트롯 DEATH MATCH"
Release Date: 2019.03.30
홍자, 김나희 – 콩깍지
Track 03 from EP "미스트롯 LEGEND MISSION Ⅱ"
Release Date: 2019.04.26
홍자 – 사랑 참
Track 01 from EP "미스트롯 LEGEND MISSION"
Release Date: 2019.04.19
홍자 – 되돌려줄거야 (Ballad Ver.)
Track 07 from Album "미스 몬테크리스토 OST"
Release Date: 2021.06.30
홍자 – 되돌려줄거야
Track 01 from Album "미스 몬테크리스토 OST"
Release Date: 2021.06.30
김현철, 홍자 – 내가 니 편이 되어줄게
Track 04 from EP "더 콜 2 (The Call 2) 세 번째 프로젝트"
Release Date: 2019.08.17