While Rihanna was out in LA early Monday morning celebrating Los Angeles Clipper Baron Davis' 30th birthday, the DJ at Hollywood Club MyHouse sent a message to the singer – along with everyone else in the club.
"She was seated upstairs next to Baron's party, dancing on the railing overlooking the club," a source said.
During his set, DJ Cobra reportedly played a sample of the Jump Smoker's song, "My Flow So Tight," which contains the lyrics, "Chris Brown should get his a** kicked."
The crowd at the Hollywood hotspot reportedly "went wild" for the blatant Chris Brown slams.
As previously reported on AccessHollywood.com, Rihanna is gearing up for a live return to the stage in Dubai on May 28.
Rihanna was forced to cancel her appearance at the Grammys on February 8 after an alleged beating by then-boyfriend, Chris Brown, just hours before. She also canceled dates in Malaysia and Jakarta following the incident.
Brown pleaded not guilty to felony assault and making criminal threats on April 7 in Los Angeles Superior Court.
Related Content from AccessHollywood.com:
PLAY IT NOW: Chris Brown Pleads Not Guilty (April 7, 2009)
PLAY IT NOW: T.G.I.F. Is Rihanna Ready For A Comeback? (April 16, 2009)