Kim Kardashian has vowed to eat better -- she loves junk food -- but she just can't seem to shake her bad eating habits. Even boyfriend Reggie Bush has been pushing her to take better care of her famous body. What will it take for Kardashian to get her butt in gear? Training for Dancing with the Stars, that's what.

Kardashian is already in rigorous rehearsals for the show, and she hopes it's going to do her prized "booty" some good. She wants to firm it up, shape it up, tone it up. And she wants to sport the sexy thing in dance costumes that show a little skin. The better shape she's in, the more risqué her attire will get. Her first outfit is not so crazy -- it's just a ball gown, elegant and a little bit more covered up -- but it shouldn't be long before she's baring more and more. She's dancing eight hours a day with pro partner Mark Ballas and already, she's noticing changes in her figure.

Stay tuned. Dancing with the Stars premieres live on ABC at September 22 at 8 PM.