Jamie Foxx might joke but apparently he doesn't play!  The actor/singer/comedian was spotted knucking and bucking  at Usher's pre-Grammy concert in Hollywood last night.

Folks who saw the fight told TMZ that Jamie was in an exclusive lounge area near the stage when people started pushing and shoving. Allegedly, someone took a shot at Jamie and he threw a punch right back to defend himself.

Some unnamed sources around the web that claim to be inside described the altercation as a "knock down drag out fight" but Damien Dante Wayans (nephew of Damon and Keenan Ivory)went on camera and described the fight as "a little altercation between two friends."

Hmm maybe we'll have to blame that one on the alcohol (that was too easy, I couldn't resist).

At the end of the night, they say the cops weren't called and nobody was hurt, but remind us not to get too close to Jamie if we're ever in the club with him.

TTowonubi