Justin Bieber's alleged one night stand says the star was one of her "best".

Brazilian model Tati Neves claims to have spent the night with the pop star after a party at his villa in Rio de Janeiro earlier this month.

The 27-year-old previously dished about how the 19-year-old looked naked, and while Justin has remained silent on the matter, she's now saying their night together was off the charts.

"[He] was one of the best I've ever had," she told AKM-GSI photo/media agency, according to PageSix.

Tati also said Justin serenaded her and called her "beautiful" during their alleged night together.

The model, who denies claims she's a prostitute, said the star was very attentive.

"There was a lot of exchange of affection," she said. "He was the way a man has to be in bed."

Tati made headlines when a video she filmed of Justin sleeping in bed went viral.

The model previously insisted she never meant for the video she took of Justin to become public, claiming a friend of hers posted the footage on YouTube without her permission.

"It wasn't me that posted the video," she told UK newspaper The Sun. "I was still in bed with Justin when my friend texted me to say, 'Oi amiga, where are you?'

"I texted back, 'I'm here in bed cuddling up to Justin Bieber.' The video was just for her eyes only. I am really angry with her."

Justin has meanwhile declined to speak on the matter.

The pop star is currently back in the US on break from his Believe world tour.