FitCeleb Kim Kardashian is already in rigorous rehearsals for Dancing with the Stars, and she hopes it will have a positive effect on her famous derrière.

"I'm hoping that it'll firm it up and shape it up," she said during a launch party for the Pink Blackberry Curve at L.A. boutique Intermix. "Everyone is asking if I'm worried it's going to go away. No, it's going to tone it up. I can use that."

So, will she flaunt what she's got in sexy and slinky ballroom costumes? Kardashian said she expects to show off more than a little skin as the competition moves forward.

"Today the costume that I tried on wasn't as crazy, [but] the better shape that I get into they will be a little more sexy and risquee," she said. "I'm starting off with maybe a ball gown, something a little bit more elegant and a little bit more covered up."

But it shouldn't be too long before she's dancing in sexier costumes. Kardashian, who upped her fitness regime in preparation for the competition, is now dancing eight hours a day with pro partner Mark Ballas.

 "I'm seeing a slight change [in my figure]," she said. "I realize that when I would try to work out really fast, that I would be burned out. I would work out for two days and then wait a few weeks and then workout for a few days again. I decided to stay focused and continuous and I started to see a major change. So, I think I'll start to see a slow progress throughout the whole show."

Definitely seems like she's got the right idea! Hopefully her toe will heal by the time the season starts! It must be a killer to work with that thing during rehearsals. Sympathy votes much?!

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