Girl group Girls' Generation held a successful concert during SMTOWN WEEK.

On December 22, Girls' Generation held their 'SMTOWN WEEK GIRLS' GENERATION-Marchen Fantasy' concert.

At the concert, they performed many of their hit songs including, "Gee", "The Boys", "I Got a Boy" and more.

They also sang songs from their new Japan album as well as Christmas carols for the holidays.

Each of the members held their solo performances as well and gained much attention.

Some members held duets while others performed other artists songs.

Sunny performed Brown Eyed Girls' Gain's "Bloom" while Jessica performed Lee Hyori's "Miss Korea."

These performances were a huge hit amongst the fans.

Girls' Generation thanked their fans and stated that this day was a huge present to them.

On the other hand, SMTOWN WEEK will continue until the end of this year.