After weeks of speculation over reports he fathered a three-month-old child, Justin Bieber has taken a paternity test to disprove the claims made by Mariah Yeater.
According to sources, the singer took the test at a lab on Friday under "very controlled circumstances".
And it is now Mariah's turn to provide a DNA sample from her son Tristyn to see whether the singer's DNA matches.
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Last week, the 17-year-old's manager, Scooter Braun, said Justin was "ready to take a paternity test, at any moment", although he is not obligated.
His rep explained that he "doesn't mind" taking the test and just wants to "go ahead of it and be fine."
And judging by these pictures, taken the morning after taking the test, Justin is confident about the results.
The star treated girlfriend Selena Gomez to a special breakfast at a cafe in Los Angeles after putting on a show of unity at the American Music Awards.
The Monte Carlo star has recently confessed she's found it difficult to deal with the paternity allegations made against her boyfriend.
When asked on American Ellen DeGeneres Show how she'd been coping with the headlines, Selena replied: "Yeah, it's not easy."
The 19-year-old admitted it had been a crazy two weeks "to say the least".