A woman who claims Justin Bieber fathered her baby in a backstage bathroom could be investigated for having sex with a minor because the singer was 16 at the time.

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 yesterday as court documents were leaked.

Police in Los Angeles may investigate an alleged sexual liaison between teenage pop star Justin Bieber and a now 20-year-old woman because it violates California’s statutory rape law, a police commander said today.

Justin Bieber has been asked to undergo a DNA test to determine if he is the father of a fan's baby.