I'm going to a 60's themed party this weekend, what do I wear?!

I'm going to a 60's themed party this weekend, what do I wear?

Something that I don't have to go too far or spend to much on.

if want to be late 60's wear hippy style tie dyed stuff think Woodstock)
if you want to be mid 60's- go with a micro mini dress, big fake eyelashes, white lipstick ( think Mod, Twiggy)