Song Ji-eun is a member of the four-member girl group Secret. She is the main vocalist of the group. Before her official debut, she filmed the debut documentary "Secret Story." On October 13, 2009, Secret officially debuted with their single "I Want You Back." Their many songs after that, such as "Magic," "Madonna," "Shy Boy," and "Poison," accumulated a lot of popularity for the group. Ji-eun's voice received a lot of love, and her name is often seen on various vocalist ranking lists. On February 28, 2018, she announced her departure from Secret on her Instagram and began working as a solo artist. Her representative works include "My Secret Romance," "Melting Me Softly," and more.