Yeah, I don't know how to break this to you, but your local school district isn't the only one in the world. And some of them start classes earlier than others. Some have already started around here.

To answer your question, fake cheerleader is a snotty bitch because she thinks being a bimbo in a miniskirt makes her OMGSPECIALANDIMPORTANT. If she were real, ten years from now she'd be selling her ass for crack after she figured out that she can't make a living waving pompoms around and looking cute.