Eminem onstage, GLAAD expressed disappointment that John had consented to the Grammy duet. In April, GLAAD honored John with its Vito Russo Entertainer Award in recognition of the singer having "furthered the visibility and understanding of the lesbian, gay, bisexual and transgender community."

"GLAAD is appalled that John would share a stage with Eminem, whose words and actions promote hate and violence against gays and lesbians," Executive Director Joan M. Garry said in a statement issued Saturday.

"Last year GLAAD bestowed upon John one of our most prestigious honors, named in honor of GLAAD founder Vito Russo, for outstanding contributions to combating homophobia. We believe John's actions today violate the spirit of this award."

Prior to the Recording Academy's confirmation of the duet, GLAAD had blasted NARAS for allowing the rapperto perform at all.

"Eminem should not have another platform for his hateful lyrics," Garry noted in a statement released on Friday.

"GLAAD is deeply offended that [NARAS] is yielding its Grammy Awards stage to Eminem," Garry said. "While we recognize that the Academy has restricted Eminem's performance to the song 'Stan,' that song  while less homophobic than much of his material  still contains misogyny and images of violence and murder."

The song's verses are a series of letters to Eminem from a deranged Eminem fan who eventually kills himself and his pregnant girlfriend  portrayed in the video by Dido  by driving his car off a bridge. In the final verse, Eminem responds, counseling the fan, "You and your girlfriend need each other/ Or maybe you just