LOS ANGELES (AP) — An allegation that Justin Bieber fathered a baby by a woman who has filed a paternity suit is “demonstrably false,” a spokeswoman for the singer said this week.

Melissa Victor said in a statement that Bieber’s camp will “vigorously pursue all available legal remedies” in response to the allegation.

“While we haven’t yet seen the lawsuit, it’s sad that someone would fabricate malicious, defamatory and demonstrably false claims,” Victor said.

Online court records show Mariah Yeater filed a paternity lawsuit against Bieber, 17, on Monday in San Diego Superior Court. California law keeps paternity matters confidential but Radar Online posted a copy of the lawsuit on its site.

Yeater, 20, said she had sex with Bieber after one of his concerts at the Staples Center in October 2010, according to the posted suit. She said she gave birth to a boy in July and believes the teen heartthrob 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.

Yeater’s attorneys said in a statement provided to The Associated Press that their client isn’t seeking a large amount of money from Bieber.