Brown Eyed Girls' JeA and singer Jo Kwan Woo collaborated for a winter ballad on the December 15th 'winter special with friends' episode of KBS2TV's�'Immortal Song 2'.

The two singers performed a powerful yet sweet rendition of "Winter Story". Though they both expressed they were nervous before getting on stage, JeA and Jo Kwan Woo captured the audience with their rich, mesmerizing performance.

MC Jung Jae Hyung commented, "It's a song with a high key, but JeA sang it in one key and Jo Kwan Woo [harmonized by going three keys higher]. I got goosebumps."

Check out their performance below!