The UFC 141 pre-fight press conference took place today and featured all the stars of the show fielding questions from the media and fans in Las Vegas, Nevada.

That included Nate Diaz and Donald Cerrone, who will square off in the co-main event of the evening this Fri., Dec. 30, 2011, at the MGM Grand Garden Arena.

As per usual, the two did their staredown but as always seems to be the case when a Diaz is involved, things got testy. For whatever reason, Nate knocked Cerrone's hat off his head before shoving him clear across the stage.

Here we go.

Check out the video of the incident after the jump. For the staredown pic click here and for the press conference newsa and notes click here.