Justin Bieber will take a paternity test and then sue the woman who claims he fathered her child, his spokesman has said.
Matthew Hiltzik said the 17-year-old Canadian singer will take a paternity test when he returns to the US within the next two weeks.
He also said the teenage pop star's team plans to "vigorously pursue all available legal remedies to protect Justin".
The paternity suit was filed last week in San Diego Superior Court by Mariah Yeater.
She says she had just turned 19 when she and Bieber, then 16, had a brief sexual encounter after one of the singer's concerts last autumn in a backstage bathroom at Los Angeles' Staples Centre.
Bieber maintains he has never met Yeater.