Invincible Youth always is one of my favorite show due to able to see the idol girls group members showing hilarious side of them all.
Besides the girls also didn't care much about their idol image by frequently showing us various bold act and never been failed to entertain the viewers. This time is our love black pearl Yuri turn, the yoga teacher for G7, Yuri was sharing a good exercises to relax facial muscle~~~~~^_____^~~~~~.
Don't want to reveal too much spoilers here!

Let roll to see the video clips;

 

video credit to sosizwonderbang
nicholas@NOW Is Girls' Generation