California rich girl Paris Hilton may have to start serving a 23-day jail sentence by Tuesday, but she doesn't seem to be letting it get to her.

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The 26-year-old hotel industry heiress emerged from her Hollywood Hills home to a mob of photographers Saturday, wearing a bright yellow sunhat and a smile on her face, People magazine reported.

She reportedly was taken to a nearby coffee shop in a black stretch limo Escalade and then promptly returned home.

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"She looked gorgeous and seemed in high spirits," said an onlooker. "She was smiling and playing coy with the paparazzi."

Hilton has until Tuesday to begin serving a minimum of 23 days at the Century Regional Detention Facility for violating probation.

Sheriff Lee Baca, whose department oversees the facility in Lynwood, Calif., where Hilton is to do her time, said the actress will not be allowed to "be seen in handcuffs -- or in the back of a police car, forlorn and in handcuffs."

"Jails are not circuses and not places where 'fun' is the priority," Baca said. "Jail should be a corrective learning experience."