Spears' publicist Lisa Kasteler denied the media reports on Thursday and said that the singer was not planning to pose at all-even with her clothes on.
Kasteler said that Spears had offered to provide a photograph of herself for a PETA poster to be used at the New York nightclub Centro Fly in order to promote its new policy refusing entry to patrons wearing fur.
But the singer has apparently suspended all negotiations with PETA following the reports that she planned to pose naked, Reuters reports.
"Notwithstanding the meaningful work that PETA does, we cannot be involved with an organization that would distort the truth, " Kasteler said.
PETA campaign director Dan Matthews denied ever saying Spears would pose naked.
"We've never distorted anything, " he told Reuters. "We simply confirmed that we planned on doing a poster with her. We never said anything about nudity.
"If the downside is that the whole world knows Britney Spears is anti-fur, that's a good thing," he added.
Kasteler said the singer still feels strongly about animal rights and would find another organization to be involved with.
The latest was Dominique Swain, star of the 1997 remake of Lolita, photographed writing the slogan "I'd Rather Go Naked…" on a chalkboard. As with the others Swain's poster was shot from the side in a discreet manner.
Spears dropped the idea of using a caged tiger in her stage show the MTV Video Music Awards in New York in September after being criticized by PETA.