Justin Bieber took a DNA test on Friday in New Jersey to disprove Mariah Yeater’s claims that he’s the daddy of her son, a source confirms to Us Weekly.

According to TMZ, Justin took the test at a lab under “very controlled circumstances.” Now it’s Yeater’s turn to provide a DNA sample from her son Tristyn to see whether Justin’s DNA matches up.

Last week, Scooter Braun, told Extra that Bieber was “ready to take a paternity test, at any moment.”

The announcement was a surprise, since Bieber is not obligated to take the test. Yeater, 20, had claimed that she had sex with Bieber backstage at an L.A. concert in October 2010, but she dropped her paternity suit earlier this month.

we alla now that justin isnt the father :P