Korea's "national little sister" IU will bring her bright cheer to Mnet's "M! Countdown" this week with a splash of holiday flavor. Wanting to wish everyone a ''Merry Christmas in Advance", IU will be performing the track for the very first time on December 23rd. The production crew of 'M! Countdown' stated, "With Christmas just around the corner, requests from fans wanting to see a performance of IU's 'Merry Christmas in Advance' flooded in. Since the next broadcast is on the day before Christmas Eve, we want to liven up the Christmas mood; therefore we're going to decorate the stage so that both the artist and fans can enjoy the performance." Check back with allkpop later on this week to catch IU's special Xmas stage! Source: TV Daily via Nate