The 20-year-old woman who claims she had a baby with Justin Bieber, during a 30 second hook-up after an LA concert, is speaking out for the first time on camera.

Mariah Yeater sat down with The Insider to further discuss allegations that Bieber is the daddy of her 4-moth-old son, Tristyn Anthony Markhouse, though the 17-year-old teen idol denies ever meeting the fan.

Yeater said on first meeting "The Biebes":

    "He immediately took a liking to me, and we just got to talking, and it was kind of me and him with other people. And then he eventually asked me, he said, "Would you mind if we could go somewhere and be alone?”


But once they were alone, Justin's mood allegedly transformed. Yeater added:

    "When we got to what turned out to be a bathroom his whole demeanor changed. It went from cute and gushy to just kind of more aggressive."


And what message does she have for those who don't believe her story?

    "I’ve provided evidence to my attorneys and it will show in court, to prove that my allegations are true."


When asked why Justin’s security guard claims Bieber went straight from the stage to his dressing room – where his mom was waiting – before headlining directly into the car on the night in question, Mariah simply replied: “No comment”.

Bieber has maintained his innocent throughout and plans to take a DNA test, and file a lawsuit, in response to Yeater's allegedly false claims.