ummm...i get shy around my brothers friends and blush when they talk to me sooo...if they would look at me i would blush and smile like an idiot.then i would pretend to be cool and you know when you try to be cool you always do something stupid like trip or...yeah you get my point.so really tie it all together and you better have your camera ready to catch the worst girl who can't talk to a guy without triping LOL!
I would be soooooooo happy, but I wouldn't be screaming and all over them, because that would probably annoy them and freak them out, so I would just say hi, smile tell them I'm a huge fan and try to get a pic of them and have them sign my One Direction book