costume ideas?

[feelingautumn.livejournal.com]

i had this great idea to go dressed as siouxsie sioux for my sons first birthday which is the day before halloween, hence the halloween theme.

anyways, things messed up.
it is summer here in australia and what i had in mind is too hot.

so what i have otherwise is a long straight black wig (morticia-ish)
i need some ideas as what to go as that doesn't involve too much effort, can maybe incorporate the wig, and that won't be too hot to wear outside in the middle of the day.

argh.
it is only one week away.
i neeeeed ideas!
any famous people?
some sort of icon?
i don't know??

HELP!!