Rihanna Rides Dirty on Mechanical Bull

Rihanna shows off her wild side while riding a mechanical bull during a night out on the town in NYC. RiRi sure knows how to have fun. The songstress lasted pretty long on a mechanical bull at city hot spot Johnny Utah's.

Rihanna's bull riding adventure was accompanied by the Kings of Leon's hit song "Sex on Fire."

OK! HOT GALLERY: RIHANNA GETS SASSY ONSTAGE IN MIAMI

The video of the Grammy winner on Celebuzz is filled with cheers from fellow bar-goers and one lady's voice who continually yells "You Go, Girl!" in the background.

Even flexible RiRi was not impervious to the robotic-bull's jerk movements, and she finally falls off after almost a minute.

OK! HOT GALLERY: RIHANNA ISN'T SHY, SAYS "HI!"