Cause for concern?

Should I be concerned that tonight as the kids were downstairs cleaning we heard Ryan singing the tune "Don't you wish your girlfriend was hot like me?" with the words "Don't you wish your sisters would clean with me?" and "Don't you wish you had a girlfriend that would clean with me?" Needless to say, Brad and I were laughing hysterically. I had a bit of concern that he even knows the tune to that song, Brad just found it hilarious!!!