[Video] Jessica,Seo Hyun,Gain and Ji Eun want you to "Have yourself a merry little Christmas" on Music Core!

SNSD's Jessica and Seo Hyun,Brown Eyed Girls' Gain and Secret's Ji Eun had a wonderful collaboration on today's Music Core special.

The girls sang Have Yourself a Merry Little Christmas on the show,check out their performance here! Sharing is sexy