Kendra Wilkinson Calls Out Holly Madison's 'Disgusting' Lies on 'Kendra on Top' : 'She's Not Living on Earth'

"What Holly is saying is extremely false," the reality star says of Madison's tell-all memoir

It’s almost time for the big showdown.

In an exclusive clip from Kendra on Top, Kendra Wilkinson prepares to confront her former The Girls Next Door costar Holly Madison.

“What Holly is saying is extremely false,” Wilkinson says in the clip. “I’m like, ‘Where did this s— come from?’ ”

The pair had a falling-out years ago, and their feud was reignited over the summer after Madison published her tell-all memoir, Down the Rabbit Hole, which Wilkinson said was “re-writing history” about her time at the Playboy Mansion and relationship with ex Hugh Hefner.

Wilkinson, 30, doesn’t have much of a plan, other than going up to Madison, 35, with a copy of the book and telling her, ‘Sign this bitch.’ ”

“She’s living as a fake cartoon, I think. She’s not living on Earth with us. And that’s how it felt, all those years living there,” says Wilkinson. “She really played this role. This fantasy type of role. It wasn’t because of Hef. Hef never told her and forced her to do that. Maybe that’s why she didn’t marry her.”

EXCLUSIVE! The Shocking Moment Kendra Wilkinson Finds Out About Holly Madison’s Tell-All

In her book, Madison claims that debauchery ruled the Playboy Mansion, with group sex, drug use and alcohol abuse rampant.

“Someone needs to have a voice against this. Hef won’t do it. He’s too nice of a guy,” says Wilkinson in the clip. “It’s just weird how someone can get away with such a thing.”

The clip ends on a cliffhanger as she is about to enter the signing.

“This is disgusting. I’m not going to let this bitch get away with something like that.”

As for whether the confrontation takes place, asked about the clip on Twitter, Madison denies that it happened.

RELATED VIDEO: Kendra Wilkinson on Holly Madison: ‘I Made a Mistake by Thinking What We Had Was Real’

Kendra on Top

airs Fridays (9 p.m. ET) on WEtv.