Holly Madison: Nikki Beach Grand Opening

Holly Madison and Josh Strickland attend the Nikki Beach Grand Opening White Party at Tropicana Las Vegas on May 26, 2011 in Las Vegas, Nevada.

Credit: Wire Image

Angel Porrino's Birthday Celebration At Gallery

Holly Madison, Angel Porrino and singer Josh Strickland attend Porrino's birthday celebration at Gallery Nightclub at the Planet Hollywood Resort & Casino on May 14, 2011 in Las Vegas, Nevada.

Credit: Wire Image

Holly Madison: The Animal Foundation Event

Holly Madison and Josh Strickland attend The Animal Foundation's 8th Annual 'Best in Show' at Orleans Arena on May 1, 2011 in Las Vegas, Nevada.

Credit: Wire Image

Holly Madison Goes Brunette For Music Video

Holly Madison has crossed over to the dark side ... or at least her hair has!

The "Holly's World" star flaunts a brunette 'do in the new music video for her "Peepshow" co-star Josh Strickland's single "Report to the Floor" -- which also has appearances from show regulars Angel Porrino and Laura Croft.

Credit: Too Fab

Josh Strickland & Angel Porrino: Absinthe Duo

Josh Strickland and Angel Porrino pose for photos at the Absinthe premiere at Caesars Palace on April 1, 2011 in Las Vegas, Nevada.

Credit: Wire Image

Holly's World Cast Celebrates Josh's Debut

Holly's World stars Angel Porrino, Josh Strickland, Holly Madison and Laura Croft appear at the LAX Nightclub at the Luxor Resort & Casino for Strickland's debut performance of his single, "Report to the Floor" February 23, 2011 in Las Vegas, Nevada.

Credit: Zimbio

Photos by Ethan Miller/Getty Images North America

Holly Madison Hosts A Valentine's Day Affair

Holly Madison, Josh Strickland, and Angel Porrino arrive at the Tryst nightclub at Wynn Las Vegas to host a Valentine's Day event early February 13, 2011 in Las Vegas, Nevada.

Credit: Zimbio

Photos by Ethan Miller/Getty Images North America

Holly Madison Clashes With Hef's Fiancée

A new love at the Playbody Mansion is making bunny fur fly.

Playboy founder Hugh Hefner's ex-girlfriend Holly Madison and her reality show costar are making no secret of their low opinion of Hef's new fiancée, Crystal Harris.

Madison, 31, has been reluctant to speak about Harris, but when pressed by PEOPLE, her on-camera sidekick Josh Strickland said, "We don't really know her that well, but the few times we've seen her, it's been a cold shoulder. We really haven't done anything to her."

Madison then jumped in, saying Harris's true colors can be seen in an un-aired scene. "They really need to show that birthday footage," Madison says after mentioning that Hef's gal, 24, appears in an episode of her show "for a second."

"Crystal called us clowns in a circus," adds Strickland of the alleged tape. "It's just kind of like, 'Who the hell are you?' "

But Harris's camp denies any animosity.

"Crystal has always been extremely friendly to Holly, and if that wasn't the case, then Holly wouldn't be continuing to return to the mansion," Harris's manager Michael Blakey tells PEOPLE. "She doesn't understand why Holly and Josh would make these allegations. She has no ill feelings toward Holly at all. Crystal believes this is a misunderstanding. I know her very well, and I've never heard her say an unkind word about anyone."

As for Hefner, 84, Madison's thoughts about his engagement – which will play out in the second episode of her show this season – are complicated.

"I don't really feel just one way about it," says Madison, who is also the star of the Vegas show Peepshow and the face of AMIClubWear clothing line. "It's not really something that's easy for me to sum up, so I need to get all the layers of my feelings out. I just wanted to see Hef and go up and talk to him about it. There's definitely a lot of pressure. People expect me to feel a certain way."

Credit: People

Holly's World Stars Visit Santa Claus

Holly's World co-stars Holly Madison, Josh Strickland, Laura Croft and Angel Porrino (who brought along her son Roman) visited Santa at El Segundo Sol at The Fashion Show Mall.

Credit: Las Vegas Nightlife

Holly's World Stars Dine At Buca Di Beppo

Holly Madison celebrated the "Holly" Days with the cast of Holly's World - Angel Porrino, Laura Croft, and Josh Strickland - at Buca de Beppo in Las Vegas on December 14, 2010.

Credit: Wire Image

Holly's World At XS To Celebrate Josh's Birthday

Last night, October 23, the stars of Holly's World, Holly Madison, Angel Porrino, Laura Croft, and Joshua Strickland, were out celebrating Josh's birthday at XS Nightclub in Las Vegas, NV.

Credit: XS Las Vegas

Holly Madison: Ne-Yo's Birthday Party At Tryst

Holly Madison along with make-up artist, Joyce Bonelli and Holly's World co-star Josh Strickland arrived to celebrate Ne-Yo's birthday at the Tryst nightclub early October 15, 2010 in Las Vegas, Nevada.

Credit: Zimbio

Photos by David Becker/Getty Images North America