Who sang that OST? 'That Winter The Wind Blows' edition
The voice behind Snowflower is 32 year old Gummy, which means "spider" in Korean. Her real name is Park Ji Yeon and she has been a singer for over 10 years. In fact Gummy was part of the YG Family until recently. Supposedly, when her contract expired, she decided not to renew it. She has various awards to her name, eleven OST's, two mini albums, and five studio albums.
Below is her performance of Snowflower on Inkigayo, and her outfit is fabulously unique! I'm pretty sure those are leather knee-highs she's wearing!KrisE! @K_Kisses_KrisE (source via jpopasia.com)