Socialite-actress Paris Hilton and her family are concerned about reports that a blonde woman is impersonating her around the world.

According to the New York Daily News, the look-alike supposedly carries a chihuahua like the one Hilton has and even uses her catchphrase, "That's hot".

A source was quoted as saying: "Once, this woman tried to get VIP treatment at Disneyland. She was telling people she'd call (Disney chief) Michael Eisner. Another time, she tried to check into The Four Seasons in Maui, where the Hiltons have stayed before. She was asking for upgrades.

"The hotel management finally got suspicious and called (Paris' parents) Rick and Kathy, who told her Paris wasn't even in Hawaii. The Hiltons got really worried when they heard someone had applied for a credit card in Paris' name. They're starting to wonder if there's more than one person pretending to be their daughter."