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" ====