04/12/2009 at 11:40 AM EDT
There are some big changes coming to the Kardashian household. "Someone in the Kardashian family will soon have plastic surgery," Kim Kardashian told PEOPLE exclusively at the Seminole Hard Rock Hotel & Casino Saturday night.
The 28-year-old star of Keeping Up with the Kardashians said viewers will be surprised at who gets the makeover. "I can't tell you who, but someone in my family will look totally different and viewers will see it all on the show very soon," said Kardashian, who spent the evening hosting the opening of Hard Rock's new club Opium – even smashing a guitar on the red carpet as a resort tradition – and hanging out with boyfriend Reggie Bush, Venus Williams and brother Rob.
Wearing a short, sleeveless navy cocktail dress and matching pumps, Kardashian also told PEOPLE that she – with her mom and sisters, Khloe and Kourtney, – is preparing to open a Miami location of Dash, their Los Angeles clothing store.
"We are excited and hope to find a good Collins Ave. location to open by June," she said, breaking the fashion news. "We see Miami Beach as a hot market and will stock it with more beach attire than we do in L.A because of the tropical environment. We will then open a second store in L.A. So we have a busy summer ahead."
Inside of the red and gold designed lounge, Kardashian, who was gracious to the many fans who wanted to meet her, was presented with an Easter basket of colored eggs, a stuffed bunny and bottle of champagne.
Kardashian and Bush then rose early Sunday and flew to New Orleans for an Easter fest with Bush's family.