Girls' Generation's Taeyeon and Tiffany defied odds by being pretty even when putting on 'ugly faces'.

Taeyeon shared on her Instagram, "TRUE BEAUTY...... does not care LOL #BigMouthOwner #Naturalist." In the selca set, Taeyeon and Tiffany weren't afraid to let loose by sticking out their tongues, rolling their eyes, moping, and giving a wacky wink for fans.

SONEs laughed out loud and commented, "You girls just crack me up", "TaeNy is real", "True Beauty", and "Oh my gosh, my feels."