Justin Bieber reportedly partied in a strip club in Houston, Texas, on Friday night (10.18.13).
The 'Heartbreaker' hitmaker, who split from Selena Gomez earlier this year, allegedly left one of the professional dancers in the club, VLive, in "shock" after grabbing her butt.
Known as DiamondsR4Ever, she tweeted on Saturday (10.19.13): "@justinbieber went The Fuk In Tonight!!
"He Touched My Ass I Almost Fainted!
"He Was Like Its Real!! (sic)"
She added: "I've Danced For A lot Of Celebrities And They Normally Don't Phase Me But Justin just Had Me In Shock!
"I am now a @justinbieber Fan"
The dancer also claimed that Justin was partying at the club with boxer Floyd Mayweather, 36, and hinted the duo were extremely generous.
She wrote: "S/O (Shout out) to @FloydMayweather Too!! MoneyTeam went In!!"
The Canadian singer, 19, has sparked controversy for partying in over-21s nightclubs in recent months.
The 'Beauty And A Beat' singer's mother Pattie Mallette recently admitted she finds it "difficult" to let him make his own mistakes.
She said: "When your kids hit a certain age your parenting style changes and it is hard letting go.
"His life was my life and now I've had to let him go a little bit and let him be independent. It is hard to not be able to control everything that your adult child does."