You explain your process, show how you attempted fairness. Its OK to admit you're not perfect and that time may prove you could have made different choices, but at this time you feel you or your judging panel did their job correctly. DO NOT compare a cheerleader with another cheerleader. Hopefully judging scores were audited by impartiality, sealed and a copy left in your administrators mailbox (maybe to never be opened and that’s ok too).   Videotapes of the tryouts should also go directly to administration office for protection.