Mariah Yeater has spoken out in her first interview since filing a paternity suit against pop star Justin Bieber.

The 20 year-old sat down with Kevin Frazier from “The Insider” and gave details on their alleged tryst, and how the Biebs whole demeanor changed once they got backstage.

“When we got to what turned out to be a bathroom, his whole demeanor changed. It went from cute and gushy to, just, more aggressive,” she said.

It was reported earlier today that Justin Bieber will take a paternity test next week when he returns to the U.S. from Europe to prove that he is not the father of Yeater’s 4 month old son. He will also due Yeater and her lawyers once the tests come back negative, reps for the singer stated.

But Team Yeater isn’t afraid of the wrath of Team Bieber.

Lance Rogers and Matt Pare released the following statement on behalf of their client:

“We are encouraged that Justin Bieber will voluntarily take the paternity test. That is the only way to definitively determine who the father is. The paternity suit was filed in good faith and it will continue despite the threats.”

Well let the games begin!

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