Omar it is NOT right to call that Girl stupid, she maybe a girl with high moral values and so got annoyed with that link she got. Think from her point of view as well.

Most of the contacts know each other well, so there is a level of trust that - no this person will never send such crap to me, but in ur case, she does not know you, so its natural to get angry for getting that link.

I am from IT so know well about such worms/viruses which spread to contact list, don't use msn, till u uninstall, scan ur complete pc and then reinstall the messenger.