Marie-Anne Thiébaud is going on the offensive.

The woman accused of having an affair with Mutt Lange - and, subsequently, breaking up his marriage to Shania Twain - is speaking publicly for the first time about the allegations that have made her more of a public enemy than Dina Lohan.

"You cannot believe everything you read in the press," Thiébaud, ironically, said to the press.

When by People if she had an affair with Lange, Marie-Anne said: "No."

Of course, that response contradicts several sources close to the situation. They say Thiébaud and Lange left their spouses for each other and continue to maintain a romantic relationship.

So we guess it all comes down to this: Can we believe Marie-Anne Thiébaud?