The imposter Paris

Paris Hilton is "concerned" after hearing a skinny blonde chick is impersonating her around the world.

The fake Hilton lookalike is in her 20's, carries a teacup Chihuahua and repeatedly babbles, "That's hot." Is she wandering around with a man clone Paris too?

From the New York Daily News: "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."