2PM's Nichkhun has been one of the celebrities who update their Twitter account frequently with pictures and his latest update almost gave fangirls a heart attack. On May 27th, he posted a picture of himself and a girl in close proximity and wrote, "The love of my life- (dun panic... Its my sister = b )" Netizens commented, "Oppa, I almost have a heart attack," "ur sisters r one of the luckiest ppl in the world," "how cute, brotherly sisterly luv," etc Many thanks to jazZi^^ for the tip.