MBC's "Music Core" has returned with yet another fun and exciting show! On today's episode, JQT, Teen Top and MBLAQ made their comebacks, while Han Groo debuted and IU said goodbye. Other performers for the January 15th episode include Piggy Dolls, Can, Lee Inse, SECRET, JOO, Dal Shabet, T-ara, SISTAR, INFINITE, GD&TOP, Beige, GavyNJ, and TVXQ. Check out all their great performances below! ======== < Piggy Dolls > ******************************** < Can > ******************************** < Lee Inse > ******************************** < JOO > ******************************** < T-ara > ******************************** < SISTAR > ******************************** < INFINITE > ******************************** < GD&TOP > ******************************** < IU > ******************************** < JJ > ******************************** < Beige > ******************************** < GavyNJ > ==