김슬기, 장미여관 – 노오란 셔쓰의 사나이
Track 01 from Single "국제시장 OST"
Release Date: 2014.11.26
세븐어클락, 김슬기 – Shining Star (Feat. Fresh Uncle)
Track 01 from Single "Shining Star"
Release Date: 2017.07.31
김슬기, 성미산마을합창단 – 옷 갈아입자 (변신송)
Track 25 from Album "달빛궁궐 OST"
Release Date: 2016.09.06
김슬기 – COFFEE & CIGARETTE (Feat. 강현경)
Track 01 from Single "COFFEE & CIGARETTE (Feat. 강현경)"
Release Date: 2017.07.19
김슬기 – 발칙한 녀 (With 박재범)
Track 01 from EP "발칙한 녀 (우와한 녀 OST)"
Release Date: 2013.05.30
김지현, 백보현, 김슬기 – 오나라 Ⅰ
Track 14 from Album "대장금 OST"
Release Date: 2018.06.08
김슬기 – 너 땜에 잠이 깨
Track 08 from Album "이웃집 꽃미남 OST Special Edition"
Release Date: 2013.03.08