BTOB's Eunkwang and Kim Bo Kyung stun with their vocals in 'Just Once' vertical live

Baek Ah Yeon to release digital single 'Just Once' featuring GOT7's JB

SISTAR's Soyu provides her vocals for 'Just Once' off 'Empress Qi' OST

Vibe returns with pre-release track "I Want To Meet You At Least Once"

Super Junior's Kyuhyun sings "Just Once" for 'The Great Seer' OST