Earlier today, KBS2TV aired their Lunar New Year special, "Idol Brain Collision." The show brought together various female idol group members to battle it out in various competitions to gain the title of the "#1 Mother's Friend's Daughter" (i.e, the girl you never want to be compared to). One of these competitions included an arm wrestling tournament and f(x) member Luna showed offed her tremendous strength by dominating the competition, check out the video below. Tip: tonirose0724