Regards,
PS: I know how your daughter felt; MY father used to stand on NYC subway platforms with us, singing I Got Rhythm off key and with a complete and utter lack of rhythm. Loudly. And he did it on purpose; in reality, Daddy has a pretty good voice. Sheesh!
Gosh, we weren't intentionally trying to embarass her (and anyway, she was about a hundred yards behind us, hoping that no one she knew or possibly would know in the future would see her with us).
The irony is that she & her friend were big Andy Gibb fans.