For a cheerleading competition we're talking multiple girls here. For what I'm going to suggest to work, you need to start early, and you need to be able to roll hair quick. They should all be in uniform for this; put towels around their shoulders to keep product off their clothes.
There's a product on the market called Curling Iron Texturizer. John Amico makes it, and it's good stuff for causing hair to hold curl. Spray one girl's hair with C.I.T. then roll it onto rollers. Repeat until all the girls' hair is in curlers.
Next, go back to the first girl and do her makeup, except for her lipstick. Repeat until all the girls are made up. (Save lipstick for last because it doesn't last very long.)
And finally, check the first girl's hair to see if it's dried. If it did, take the rollers out and fluff it up some, then repeat for all the other girls. Finally, do everyone's lipstick and you're done.