If justin bieber pranked call your house and 당신 didnt know it was him just another Person what would 당신 do ?

I would ask who it is and 더 많이 than likly freak out if he said his name. If he didn't i would 더 많이 than likly yell at him like i would any other person 또는 i would go along with it for a little fun.

Talk to justin because I would know it is him.