...there have been a lot of great starry starry night ideas but one I think you should steer clear of is using a Crescent moon as that is Gamma Phi Beta's symbol -- not that we have any rights to it or anything, you just want to be original! Do a full moon -- one smiling down on the two girls looking up into the starry night...the astrological signs are a fun idea but could put off girls who are more religious....just my two cents worth!...maybe you could even weave in a little AXiD theme and have the two girls looking up into the starry night and holding teddy bears -- one blue and the other gold
By the way, I think you can buy individual black light bulbs to use with maggieaxd's idea which sound adorable!!!
Good Luck! With your track record Corina, I know that WHATEVER you end up doing will be Fabulous!!!!