SEE ALSO: The Reign of Girls Generation's YoonA in Endorsements: The CF Queen

Yes, I know the decision is a difficult one--and you can't say you will answer to both of them at the same time! But for Girls' Generation's YoonA, it seems Heechul was the no-brainer choice, as she called him back first on the November 29 airing of 'Running Man.'�

On this episode, the SuJu leader and sassy Heechul met as 'rivals' and one of the first things they did was to determine who YoonA would respond to first when each of them sent her a text message at the same time. As they anxiously awaited for YoonA's call with the 'Running Man' crew, the two friends kept poking fun at each other, insisting that their stark contrast in personalities and preferences don't make them a good match for one another.�

I think fans would insist that that stark contrast is exactly what does make them such a dynamic duo!�