ATLANTA  — Justin Bieber will take a paternity test and then he plans to sue the woman who has sued him, a representative for the teen pop star said Monday.

Matthew Hiltzik said the 17-year-old singer will take the test when he returns to the U.S. within the next two weeks.

Mariah Yeater filed the paternity suit last week in San Diego Superior Court. She said she had just turned 19 when she and Bieber, then 16, had a brief sexual encounter after one of the singer’s concerts last fall in a backstage bathroom at Los Angeles’ Staples Center.

Bieber has said he’s never met Yeater and has denied allegations that he fathered her 3-month-old.

The singer was in London on Monday to switch on the Christmas lights at the city’s two biggest shopping malls.