LOS ANGELES (AP) _ Paris Hilton was arrested early Thursday for investigation of driving under the influence after she was spotted in Hollywood ``driving erratically,'' police said.

Hilton was arrested shortly before 12:30 a.m., said police Officer I. Isabella.

``The officers observed that Hilton exhibited the symptoms of intoxication. A field sobriety test was conducted at scene, and the officers determined she was driving under the influence,'' Isabella said, reading from a police statement. He said officers stopped Hilton because she was ``driving erratically.''

Hilton, 25, was booked on suspicion of misdemeanor DUI and released on her own recognizance, he said.

Her spokesman, Elliot Mintz, confirmed the arrest and said she had the minimum blood-alchohol level to warrant an arrest. The legal limit in California is 0.08.

``She's absolutely fine,'' Mintz said. ``She didn't appear in the least bit to be intoxicated.''

At the time of her arrest, Hilton was driving home in her Mercedes-Benz SLR McLaren from a charity event where she had one drink, a margarita, he said. She had spent the day shooting a music video for her new album, ``Paris.''

The DUI was ``probably the result of an empty stomach and working all day and being fatigued,'' Mintz said.

Hilton was picked up from the Los Angeles Police Department's Hollywood station by her sister, Nicky, boyfriend Kevin Connolly and Mintz.

Video footage posted on the celebrity Web site TMZ.com shows Hilton arrived home afterward in Mintz's Mercedes-Benz, got out of the passenger side with a cell phone to her ear and said something inaudible to photographers before walking inside.

In June, Hilton had a fender-bender when her Range Rover backed into a car in a parking garage after a shopping trip.