Re: Help choosing a song for CATS auditions?
Definitely sing a musical theatre song; it's just not usually a good idea to sing from another genre unless it's specified as an option on the audition notice (is it specified?). It's wise to steer clear of overdone songs (like Wicked, don't touch Wicked), I agree, but there are a derth of songs traditionally sung by perky young girls (a la Rumpleteazer), you just might have to hunt them down.
Look at shows with similar characters - Once Upon a Matress, Hairspray, Spelling Bee, Avenue Q, Seussical, etc. all of those have potential song-choices. Without hearing your voice, it's hard to recommend specifically. What kind of stuff have you sung before?