After a break in transmission last week due to the "16th Asian Games" broadcast (although recording still went on), MBC's Music Core has returned today with a fun and exciting show! On today's show, SNSD, Co-Ed and U-Kiss had their goodbye stages, while SISTAR made a comeback. Meanwhile, S.M. The Ballad made their debut while B2ST had an early countdown to Christmas with their special outdoor Winter stage. Other performers for the December 4th episode of Music Core included KARA, PSY, Kim Jang Hoon, 2AM, Orange Caramel, Bobby Kim, Double K, Oh Won Bin, Miryo, VNT, Buzz, Byul, Yurisangja, Chun G, and Untouchable. Check out all their great performances below!