Modern Dance Performance exam?

Ok, so this week, I'll have 4 exams. I Modern dance senior exam, one tap exam, and two modern dance performance exams. This isn't my first exam, in fact I did really well for my modern exam. The issue is I'll be doing quite advanced stuff - splits, kicks, rolls, tumbles, and it's all really fast. We have winter here, and it's freezing!! I thought of warming up before my exam with my Ipod, but that doesn't seem enough, because I really can't pull a muscle - I have more modern dance exams at the end of the year. Any tips? Also, I know how to perform, but I'm doing 6 dances, one of them a intrumental drum one, and Nothing - by the Script, Iris - by the GooGoo dolls, and battlefield by Jordan Sparks. Any tips on how to really make an impression? I don't mean smile and pointe your toes, but more advanced stuff? Thanx** :)