I was on a train ride with my grandma and I had to go to the bathroom. I went in and locked the door. The song "Girlfriend" had been stuck in my head for the whole day, so I started to sing it real loud the whole time that I was in there. When I came out of the bathroom, the line of people behind me applauded me on my "performance." This one teenage boy told me that it was his favorite song. I ran out of there so fast!