I think it depends a lot on what kind of hair you have.
For my senior prom, I tried to imitate Ayu's My Name's WOMEN PV hairstyle:

More views here:
http://eneabba.net/ayu/video/videocl...ames_WOMEN.htm
I guess it's also a little difficult to gauge what's appropriate for this event. If you want something simpler/less flashy, I'd suggest something more like the Angel's Song PV hair:
http://www.video-clips.ru/uploads/po...ngels-song.jpg
EDIT: Ah, yes! The Lumix picture posted above my post is very similar to the My Name's WOMEN hair!