Mariah Yeater is the 20-year-old California woman who claims to have taken 17-year-old Justin Bieber's virginity and given birth to his baby. According to court papers obtained by RadarOnline, Mariah Yeater alleges that she was approached by a security guard after a concert and asked to come back stage. She claims she and Justin moved to an area where they could be alone, at which time his "personality drastically changed." She gave birth to her son, Tristyn Anthony Markhouse Yeater in July, also says in the lawsuit that the sexual encounter only lasted 30 seconds and at that time it was clear to her that Bieber was embarrassed and did not want to exchange phone numbers.

While no crime has been reported, Los Angeles police Cmdr. Andrew Smith told The Associated Press on Thursday that the department could investigate after Mariah Yeater filed the paternity suit against the teen heartthrob in San Diego Superior Court. Yeater had just turned 19 when she says she and Bieber, then 16, had a brief sexual encounter after one of the singer's concerts at Staples Center. She said she gave birth to a boy in July and believes Bieber is the father because there were no other possible men she had sex with at that time.

She is asking a judge for child support and a paternity test. A hearing is scheduled for Dec. 15. Bieber's camp has denied he is the child's father. It's illegal in California to have sex with someone under age 18. If the other person is not more than three years older, it is a misdemeanor, which carries up to a one-year jail sentence.

Bieber, 17, has been dating 19-year-old actress-singer Selena Gomez. Rumors about the couple's relationship began about December 2010, two months after the alleged incident with Yeater. Emails sent to Bieber's and Gomez's representatives seeking comment were not immediately returned Thursday.

Selena Gomez, sadly, also faced the threatening wrath of fans when she first started dating the Biebs. Our advice to these supporters: chill. Justin and his legal team will handle this. Bieber’s legal team has called the allegations “malicious, defamatory and demonstrably false.” Support the guy's music, but death threats?!? Be better than that. Rise above.

Following news that 20-year-old Mariah Yeater had filed a paternity suit against the pint sized pop star claiming that Bieber is the father of her three-month old baby, an army of Beliebers took to the Internet to, what else, threaten her life. The threats began coming in on Wednesday after a Star magazine story broke the news that Yeater had filed a paternity suit claiming she and Bieber met backstage at a concert in Los Angeles last year, that he propositioned her and they had sex, after which she became pregnant with his baby. Yeater claims that she tried to contact the singer through his management but that no one would return her queries.

Mariah Yater the woman who says Justin Bieber fathered her baby

Justin Bieber to Take DNA Test, Sue Paternity Accuser Mariah Yeater