The 24-year-old singer was partying at The Rose Club and was only allowed to stay after her friends intervened, The Sun reported.
"They were trying to eject her when her girlfriends starting screaming, 'That's Rihanna, you idiots!' Ri was telling the bouncers to get off and there was a scuffle. I don't think they knew it was her," a source said.
"Finally, before they got to the exit doors, they realised their mistake and the club manager ordered free drinks for the table. And a new table, of course," it added.
Although she was allowed to stay on at the club, Rihanna left at 4am for another party and those close to her are now worried her partying is getting out of control.
"Her boozy behaviour's raising eyebrows. Everyone likes a drink, but her more than most," the source said.
