i'm going to a singers fancy dress party in 2 weeks, amy winehouse is already taken, and i'm on a budget!

Im going to a action man and barbie fancy dress party and i have bought my outift (pink dress and heels), but want hair ideas, i have brown medium length (just over shoulder length) dont want to die it or do extensions any ides on hairstyles?
thanks X

Im going to a party next week and the theme is "at the bottom of my garden i found...." so me and a group of friends are going as a circus. I was going to dress up as a tiger for the circus, but now i'm not sure. Does anyone have any other ideas of what i could go as???

by the way, people are already dressing up as the ring master, acrobats, ballerina and mime.
Thanks (: