By Dylan Howard - Senior Executive Editor, Star magazine and David Perel - Editor In Chief, Star magazine

A 20-year-old California woman has filed a bombshell lawsuit against teen pop icon Justin Bieber alleging he is the father of her three-month-old baby boy, Star magazine is exclusively reporting in its new issue.

Mariah Yeater is demanding the singer take a paternity test "to scientifically confirm" he is the father of the child, according to court papers obtained by Star.

Read More Of Yeater's Shocking Claims Here

The papers were filed in late October and Yeater asks the court for Bieber "to provide adequate support for my baby."

In an affadavit signed under penalty of perjury Yeater says she was 19 years old when she had sex with the underage star backstage at one of his concerts in Los