Jessica & Krystal Jung - Say Yes(Feat. KRIS of EXO)
Krystal Jung 크리스탈 [f(x)]) - 울컥 - (All Of A Sudden) (내겐 너무 사랑스러운 그녀 OST Part.2)
Jessica (제시카) & Krystal Jung (크리스탈) - Butterfly (Acoustic Ver.) (OST To The Beautiful You)
Jessica & Krystal Jung - Say Yes