I work in HR. Couple of things come to mind:
Human Rights violation? That's a bit of a stretch. I'm not exactly sure what "human right" of hers she feels is violated...other than "they fired me because I'm an attractive woman" (which...I think is the angle they're going for in the article...)
Where I think she does have a case is, she could probably argue wrongful dismissal. Even though she was on probation, it can still be founded that there was really no justification for termination - or the 'termination" won't hold any water. (You're supposed to prove that you've at least given the employee a chance to correct their behaviour...meaning princess here, if the story is true - could've listened to what her supervisors were saying an maybe just changed her outfit...)
Finally...the part that I'm going to stick to: there is probably a lot more to this story than we're being led on to believe...y'know...while a lot of companies and managers aren't the brightest people, there usually is enough smarts to know that stupid decisions without any backing can be expensive lawsuits.
Edit: and because I'm getting to be an old, jaded, cynical asshole...once again...I'm confident that I'm right in this situation