Supermodel and "Dancing with the Stars" contender Joanna Krupa is on the cover of the December Playboy, on stands November 13, and she reveals the inspiration behind the incredible shoot!

"You can never replicate [things that Brigitte Bardot] has done, but she's such a role model [to me], so I kind of wanted to go into that kind of look," Joanna tells ET about her second Playboy shoot, which took place in London. "It was an amazing experience; I'm over-the-moon excited about it."

"I definitely feel like my body has been in better shape now than it has been before," she says of the latest shoot -- and her 'DWTS' bod -- compared to her 2005 spread. "I think right now is probably the best I've ever been."

"My fiance's seen the photos," Joanna told ET while shopping at Sky Boutique in Los Angeles. "He's happy about it; I won't lie - in the beginning when I told him I was going to do the photo shoot he wasn't thrilled about it, but he knows that I'm in the [modeling] business and he's very supportive."

ET was also there as Joanna revealed the photos to her 'DWTS' pro partner Derek Hough, who tried to play it cool -- but said he was kind of nervous and that his palms were sweating!

"Wow!" he exclaimed. "Those are beautiful. Those are fantastic. This one is not too bad either, not too shabby."

Joanna shares the cover of the December issue with Chelsea Handler.

Watch ET for more with Joanna!