It's unlikely any of us will bump into each other. so let's share costume ideas. I need one!!!!
Just get a platinum wig and tape a dildo to your unitard. Presto! Lady Gaga.
Makes me think of my plan to go as Amy Winehouse last year, which failed because I didn't get invited to any Halloween party. But it was a good idea. I hate that Halloween isn't as popular here in Europe as it is in Northern America.
Otherwise you could go as a matchstick. Go naked, your head will turn red on it's own.