In the part where Missy must do a complicated gymnastics move to join the squad, you can tell it is a stunt double. Missy's stomach is much tanner than the person who does the actual tumbling, whose stomach is really pale and not tan.
when the cheerleaders are having try-outs for a new member and Missy is told to do a "round-off back-hand-spring" she does a cart-wheel instead! Plus look at her high-kicks during the football game. Do she really look like she has the flexibility of a "hard-core gymnast"?
RavePickles, I don't know what you are talking about with the round-off backhandspring. She is asked to do a front handspring stepout, round-off backhandspring stepout, round-off backhandspring full twisting layout. And that's exactly what Missy does.