The Gay & Lesbian Alliance Against Defamation (GLAAD) is speaking out after Perez Hilton admittedly used an anti-gay slur in a confrontation with will.i.am of the Black Eyed Peas.

Perez, who is openly gay, admitted in a video blog that he used an anti-gay slur against will.i.am during a confrontation in Toronto on Sunday night, which was corroborated by will.i.am in his own video blog. Perez said in his blog that during his conversation with will.i.am: "I made the split-second decision -- that I was gonna say what I thought was the worst possible thing that thug [will.i.am] would ever want to hear," and then called the Black Eyed Peas singer the anti-gay slur.

"These are vulgar anti-gay slurs that feed a climate of hatred and intolerance toward our community," Rashad Robinson, Senior Director of Media Programs at GLAAD, tells ET. "For someone in our own community to use it to attack another person by saying that it is, quote, 'The worst possible thing that thug would ever want to hear,' is incredibly dangerous. It legitimizes use of a slur that is often linked to violence against our community. And it sends a message that it is OK to attempt to dehumanize people by exploiting anti-gay attitudes."

"We have reached out to Hilton and asked him to apologize for promoting this anti-gay slur and we would ask media outlets to avoid repetition of the slur in their coverage of this story."

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