On December 24th, MBC's 'Show! Music Core' organized some special stages for the Christmas season. This week, viewers got to see INFINITE and TEEN TOP team up for a medley of Christmas carol favorites. The members of the Starship Planet family (SISTAR, K.Will, and Boyfriend) also performed their winter single, "Pink Romance". Meanwhile, SNSD's Seohyun and Jessica collaborated with SECRET's Song Ji Eun and Brown Eyed Girls' Ga-In for "Have Yourself a Merry Little Christmas". Check out their performances below! ---- < INFINITE + TEEN TOP, "Christmas carol medley" > - < SISTAR + Boyfriend + K.Will - "Pink Romance" > - < Seohyun, Jessica, Song Ji Eun, Ga-In: "Have Yourself a Merry Little Christmas" > - < Various artists, "We Wish You a Merry Christmas" ====