it's like that dream where you forget to wear pants to work

Do you listen to your Ipod/music at work via headphones? Do you ever worry that you will start singing out loud or humming to yourself? Because I do. Worry, that is - not sing out loud or hum. At least - not that I know of. And knowing the people I sit around, they'd tell me if I was. Probably by laughing and pointing.
Anyway - I almost did it today. I was listening to the random playlist of the week and fought the urge to sing 'American Boy' out loud. I feel like randomly singing out loud would be quite embarassing - similar to those dreams where you are at school, work, the bus, etc. without pants, or something.