lol put her in a plaid or pink skirt, and write popular on a tee shirt and give her a pink "wand" (we use to make em from paper towel cores and curling ribbon and piper cleaners with beads on the end). when people ask say "shes glinda the shiz (college years) like in the book/musical wicked".
see they didnt time frame oz.
also, oz-ma was i believe a goddess type oz character but i never read much about her exact looks so you could be as creative as you wanna be.