I was sitting in a cafe in Katoomba when I saw these girls walk by. I thought to myself I really should chase after them and ask if I can take their photo. Of course by the time I launched myself into action they were half way up Katoomba street... a steep incline. I saw them duck into a supermarket, which gave me time to catch my breath a little before accosting them.
I asked them why they were dressed up and they just giggled a little and shook their collective heads and shrugged... so I guess they didn't know.