Girls' Generation fans have another reason to look forward to this week's 'M! Countdown'.

On top of the girls making their long-awaited comeback with their new track "I Got A Boy", members Hyoyeon and Yuri will be acting as special MCs for�Mnet's 'M! Countdown' on January 3rd KST.

Girls' Generation will be performing "I Got A Boy" for the first time on a music program on the show. They'll also be appearing as guests on 'Open Studio Talk'.