JUSTIN BIEBER TO TAKE PATERNITY TEST, SUING YEATER

Justin Bieber is set to take the next step – a DNA test – to prove he isn't the father of Mariah Yeater's baby.

Bieber, 17, has already vigorously denied the 20-year-old fan's claim that he got her pregnant, saying he never even met her. He will take the test once he returns to the U.S. from Europe next week, a source tells PEOPLE.