No. I haven't dressed up since I was a pre-teen. I'm just too serious, I guess, or conservative?
Although when I was pregnant with Marcus I did go out to a bar to see a band (I was the designated driver!) around Halloween time and they called me up to the stage when they were doing the costume contest - "The pregnant lady" - they thought I was in costume!

I guess you probably don't see too many 7 month old pregnant ladies at bars... but I really wanted to see the band! I was too embarassed to respond...