Eurovision costume ideas?

Every year I have a eurovision party and theres a week to go and I have no idea what country to be! In the past I have been Greece (dressed up like the flag colours) and Ireland (dressed up like a leprechaun) my friends have been the queen (UK) abba (Sweden) the Russian church with the swirly tops (don't know what they are called) and Iceland (dressed in a massive carrier bag from the supermarket Iceland :p) just to name a few. I really need some ideas of what I can be which will be easy but good, please!