Girls' Generation fans brace yourself as the ladies of the nation come up with a teaser video for their surprise comeback during 'SMTOWN WEEK' solo concert 'Marchen Fantasy'!

Along with their encore performance of 'I Got a Boy' the girls announces an early Christmas present for their fans, as the lights dimmed fans were treated with a video teaser, powerful black concept that the girls are stored for their fans.

The teaser video sent the stadium into an uproar, setting fans ablaze for a long-awaited Korean comeback from Girls' Generation!

Fans filled the stadium with cheers for the girl's long awaited comeback. Can't wait to see the full length of their MV! Excited?