Or employ reverse psychology...point to an appropriate outfit and talk about how awful it is.

Trouble is, you can only use that ruse two or three times!
Or get a year-older sorority member to show her the light.
At our alum panhellenic spring tea, when the older alumnae talk, the mothers are at attention and the daughters gaze off in the distance or their thumbs get busy texting.
When the college students talk, they're all ears!