WWW- The thought of a world with two Paris Hilton’s is pretty scary – even to Paris Hilton.

We hear the hotel heiress has contacted authorities to stop an impostor who allegedly has been using her name to live the not-so-simple life.

The scam artist is said to look so much like the “House of Wax” mannequin that friends of the real Paris recently told her it was fun seeing her in Saint-Tropez – even before she got there.

Not only does the twentysomething woman sport Hilton’s blond locks and constantly burble, “That’s hot!,” she even carries a teacup Chihuahua like Paris’ Tinkerbell.

“Once, this woman tried to get VIP treatment at Disneyland,” says a source. “She was telling people she’d call [Disney chief] Michael Eisner.

“Another time,” adds the source, “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.”

Last year, hackers penetrated Paris’ Sidekick, stealing her most private diaries, photos and phone numbers.

Hilton’s rep would say only that Paris was “concerned” by the news.