Song Ji-eun, better known mononymously as Jieun, is a South Korean singer and actress best known as a member of the South Korean girl group Secret. Aside from her group's activities, she has released several solo songs and participated in various OSTs. Wikipedia
Wannabe
(Park Ji-min)
So I Married an Anti-Fan
(Flight Stewardess That Helps Who Joon)
Wish Woosh
(Min Ji Woo)
Shh, Please Take Care of Him
(Jeon Seol)
Running Man
Immutable Law of First Love
(Lee Yeo Ri)
Sweet Home, Sweet Honey
(Oh Bom)
The Superman Age
The Man's Voice
(Go Mi Rim)
My Secret Romance
(Lee Yumi)
Longing for Spring
(Yang Mal Ja)
You Hee-yeol's Sketchbook
(Self)
SNL Korea
(Herself)
SONAMOO's Pet House