I'd probably just stand there staring at him until he left. Once he left, I would hate myself for not saying anything. Yet, I would make up a whole conversation, so my 프렌즈 would think it was actually interesting that I met a celebrity, even though they have no idea who he is.
Oh, Gube. I would do anything to just have 당신 in the same store even if all I would do is stare and most likely embarrass myself.
Do a double take...Go up to him and be like. Hi, I 사랑 you. (while crying) And be like im sorry if im bugging 당신 but can i have your autograph? and a hug? and a picture? and a kiss? while crying still then i'd probably die.... not like 에미넴 would randomly be in a store in MN in the first place but still....
I WOULD FAINT AND THEN FADE INTO CARDIAC ARREST FROM 심장 BREAK! my mouth wide open,...... yes roll back,, 당신 can tell we dont get many visitors up here in townsvillle... AT ALL we only get SHORT STACK AND ELTON JOHN! thats all!