Ex-Playboy Bunny Holly Madison threw some major shade at her former housemate Kendra Wilkinson-Baskett. The former "Girls Next Door" stars are still feuding in the battle of the bunnies, and Madison fired back at her ex-BFF, E! News reports.

"She cut me off for reasons of her own, which I'm not even aware of," Madison told E!'s Ken Baker. "[She] told me that our friendship was fake and that it was all work and for the TV show, and I was like, 'I'm sorry I'm stupid enough to think we were ever friends.'"

Hugh Hefner's ex-girlfriends have been taking jabs at each other all week, as previously reported by HNGN. The feud revolves around Madison's recently released tell-all book "Down The Rabbit Hole," which exposes life at the famed Playboy Mansion and gets candid about the relationships between Hefner's many girlfriends. It scratches beneath the surface of what was shown the reality TV series, "The Girls Next Door" (2005-2009), which portrayed the girls as friends. Madison described her life as "hell" while she lived in the mansion.

Earlier this week, Wilkinson spoke out in defense of her ex-boyfriend and said Madison made up lies and is out for "revenge" after being scorned by Hefner, HNGN previously reported.

Now Madison has responded to those accusations and has nothing but spiteful words for her former bestie.

"Yeah, well Kendra kinda came out and had some responses, and everything she said backs up what I say about her in my book," she told Baker, "so keep talking."

See Madison's full E! interview below.