The idol has hosted the show for 2 years and 6 months now, starting her run back in June of 2012. The last episode with Sooyoung will air on Christmas eve, the 24th.
The reason for her leave, as suspected, is due to her busy schedule. As fans know, Sooyoung has been juggling her schedule filming for this show as well as her drama while also carrying out Girls' Generation activities. Because there is said to be a lot of overseas promotions next year in addition to domestic schedules, she has made the ultimate decision to step down. She will relay her goodbye to viewers on the upcoming episode airing on the 24th.
Filling in the empty MC spot will be announcer Jang Ye Won, who is known as the host of 'Animal Farm', 'Football Magazine Goal!', and 'Power FM Jang Ye Won's A Night Like Today's'. She'll start appearing on the episode airing on January 7th of 2015.