The mystery woman says the star and his entourage picked out 10 prostitutes to take back to his hotel, and she earned US$500 from the alleged hour-long x-rated encounter with Bieber.
"They took us in their car to the hotel. There was so much emotion, it was incredible. I wanted to do everything with him. I did everything!
"We left the hotel around 5am. He gave me $500 because I was the one that got with him. He gave all of us concert tickets."
This comes after a woman named Gaby del Campo posted a picture of a wad of money on Twitter last week, writing, "Thanks @justinbieber for the fresh dolla bills. (sic)"
The Twitter account is now suspended.
Bieber's team vehemently denied claims he had paid for a prostitute the time, insisting the woman was one of 50 people the singer invited to a property he was renting for an after-party.
Watch: Sleeping Justin Bieber filmed by mystery woman