05/21/2009 at 07:00 PM EDT
Summer is just around the corner and Kim Kardashian is ready to show off her body.
"I feel great. I am ready for the bikini body," she told PEOPLE on Wednesday at an opening bash for Dash, her new Miami boutique with sisters Khloe and Kourtney, at the Clevelander hotel in South Beach. "I am eating well and I go to the gym every day and I already see a difference."
The 28-year-old reality star had blogged in March that she wanted was motivated to "get in better shape and tone up" after unretouched photos of her
magazine appeared on the Internet.
Besides working on her body, Kardashian – who wore a sexy, form-fitting sleeveless dress at the bash, hosted at the hotel's 1020 Music Boxx Club – is also ready for her siblings to take center stage in their own Keeping Up with the Kardashians
spinoff, tentatively titled Kourtney and Chloe Take Miami
. The E! show will focus on their new life running Dash in the south Florida city.
At the party, Khloe told PEOPLE that she's ready to jump back in the reality saddle even after her unhappy experience being a contestant on the Celebrity Apprentice
. "I couldn't wait for it to be over to go home," says Khloe. "I don't regret it, but I would never do it again."
Though she isn't the star of her sisters' new show, Kim says she'll be making guest appearances on the Miami set with boyfriend Reggie Bush. "He'll be spending time with me during the shoot," she says.
And Kardashian reported that stepdad Bruce Jenner is looking great after his recent facelift
, which was revealed on an episode of Keeping Up with the Kardashians
. " I think Bruce looks amazing!" she said. "I'm all for looking your best, no matter what it takes."