And Perez can clearly be heard calling the Black Eyed Pea band member the double F-bomb.
Perez, Will and Will's manager shout back and forth. Suddenly, all heck breaks loose and someone punches Perez in the face.
In a video on his website, Hilton claims Will's manager hit him "two or three times."
Will posted a video blog saying he never hit anybody.
What do you think?
Who started it?
And who finished it?
More Perez Hilton dish:
Photo: Lady Gaga and Perez Hilton before the fight. Credit: WireImage