I’m not going to make up some cool story about what I would do, I am going to be realistic.
I would probably instantly throw up/have a panic attack out of nervous anxiety, and it would be an awful scene. Starbucks would probably kick me out, and her security would make sure I don’t come near her.
Then later I would cry because I was in the same room with Britney and I blew my chance of meeting her because I freaked out so hard.