Hilton makes a convenient pit stop in Los Angeles. Plus: Britney, Kate Walsh, Mario Lopez and more

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TUG OF WAR

Victoria's Secret supermodels Heidi Klum and Karolina Kurkova playfully fight over the new Extreme Plunge bra at the VS store at Caesars Palace's Forum Shops in Las Vegas on Thursday. At the event, Klum helpfully explained the benefits of the new low-cut lingerie to PEOPLE: "Would you not rather see boob than fabric?"