Anyone have any really, really, really good cheerleading tips?

I lve cheerleading, but I SUCK at it and havn't done it since first grade. I'm in 6th now and trying out for the 7th grade team on May 26. Any tips? I REALLY want to get on the team becuase (A) I LOVE it. (B) I wanna show the prissy ----- at our school that even a not so popular gir can get on the freakin' team