Bubble Sisters - Be Strong [digital single] (2007) by Bubble Sisters (보컬) on maniadb.com

Performed by 버블 시스터즈 1기 (2003)
- 난다 : 보컬
- 노라 : 보컬
- 김수연 : 보컬
- 하루 : 보컬
Credit

Excutive Producer : FRENN ENT. 이수명
Producer : nandaTJ ENT. 서승희
Co-Producer : nandaTJ ENT. 안성환
Supervisor : nandaTJ ENT. 방유진
Recording Studio : Silk
Recording Engineer : 장민
Mixing Studio : Silk, Vitamin
Mixing Engineer : 고승욱, 조준성, 선영
Mastering Studio : Sonic
Mastering Engineer : a.k.a big boom. 전훈
Art Direction & Design : 원종현
Stylist : 홍현진
Music Video producer : 권영빈
Casting : 박 글라라
Photographer : 한영석
Hair & Make Up : 정샘물 인스피레이션, Twist Head (바스키아)