NEW YORK, Dec. 9 /PRNewswire/ -- The 18-year-old singer beat off competition from Charlize Theron, Ashley Olsen and Dancing with the Star's John O'Hurley to become the planet's most canine-friendly celebrity.

The online poll conducted by readers of The New York Dog Magazine and The Hollywood Dog Magazine voted Paris Hilton the World's Worst Dog Owner. Voters put the heiress in the doghouse for replacing her Chihuahua, Tinkerbell, for a ferret.

"Our readers felt Ms. Hilton's dog-parenting skills left a lot to be desired," said Leslie Padgett, editor of The New York and Hollywood Dog Magazines. "First she loses Tinkerbell, then she ditches her for a cuter dog, then replaces that dog with a ferret, then a Kinkajou monkey and then, I gather, a goat. Recently Tinkerbell was spotted back in Paris' arms. But how long will she be in favor this time?"

Joss Stone, who is the face of The Gap, volunteered for the North Shore Animal League (nsal.org) after seeing images of pets left stranded in the wake of Hurricanes Katrina and Wilma.

She also recorded a PSA seeking support for the homeless pets of the Gulf coast. She has one dog, a Poodle named Dusty Springfield, a gift from an ex- boyfriend.Added Padgett: "Joss is a huge advocate for shelter dogs and it's not just talk. This year, despite an incredibly hectic schedule, she went out of her way help the dogs of Katrina and Wilma."

Stone narrowly edged out Ashley Olsen, who adopted a mixed-breed from the Animal Haven Shelter (animalhavenshelter.org), in New York this year. Tori Spelling, a Pug owner, who despite her marriage break-up, "tirelessly campaigned" for the Much Love Animal Rescue (muchlove.org) in Los Angeles was placed third.

John O'Hurley was the only man to make the cut. The former Seinfeld star and host of the National Dog Show is devoted to his Maltese Terrier, Scoshi, and Betty, a mixed breed. "I am extraordinarily fortunate to have pets," he said. "It means I have abundance."

The poll was conducted over a three-month period among visitors to thenydog.com and thehollywooddog.com. For more details contact Deborah Allan at 212-226-3955, 646-418-0743, or deborah.allen@gatsbyinc.com.

The New York Dog (launched September 2004) and The Hollywood Dog (August 2005) are published by Gatsby Publishing, Inc.