According to TechCrunch:

Renowned celebrity blogger Perez Hilton (real name Mario Armando Lavandeira) was apparently assaulted by artist will.i.am, frontman of The Black Eyed Peas and his security guards, according to messages posted to his Twitter account. We’re pretty sure this really happened, although you never know.

Follow-up tweets read that the bleeding had stopped, the police had arrived and would investigate the case further, and that today would be a normal day at work for Lavandeira without any mention of the incident on his wildly popular blog until the authorities close up the investigation.

Will’s Reply:

Perez’s Reply:

Okay firstly, Twitting such a status is bound to receive a huge reaction from
a huge following of millions, hence, obviously, Perez wanted this to be known to the world asap.

In the video reply, Perez is seen obviously very angry and on the verge of crying (which he eventually did)

He also states that Will is a coward for not hitting him on his own, and that no matter what,
assaulting someone is wrong, and he should not have done it.

Sometimes in life, we should just learn that, we are bound to receive negative remarks from time to time
And that fame comes with a very huge price tag.