From the camera flashes on the red carpet of a Hollywood awards show to the walls of a jail cell — what a difference a day makes when you’re Paris Hilton.

The 26-year-old heiress*, whose great-grandfather Conrad Hilton started the global Hilton Hotel empire, was booked* into a Los Angeles County jail early on Monday to begin serving a 23-day sentence for violating* probation* in an alcohol-related driving case.

She surrendered* to authorities in downtown Los Angeles hours after making a surprise appearance at the MTV Movie Awards, and was transferred to the Century Regional Detention* Facility in nearby Lynwood, the county sheriff’s* department said.

Once there, she was fingerprinted*, photographed and issued an ID wristband* and orange-colored jail clothing, said sheriff’s department Sgt. Diane Hecht in a statement.

Her booking photo showed her dressed in a white V-neck top, wearing eye makeup and lip gloss with a slight smile, her blond hair swept to one side over her right shoulder.

Sheriff’s department spokesman Steve Whitmore described her as “cooperative,” “calm” and “focused” during booking.

“This is an important point in my life, and I need to take responsibility for my actions,” Hilton said in a statement issued by her lawyer. “Although I am scared, I am ready to begin my jail sentence.”

Her lawyer, Richard Hutton, said after a jailhouse visit with Hilton on Monday that she “is doing well” and that she intended* to use her time to reflect on her life and decide how she can “make the world a better place.”

Hecht said Hilton will be kept alone in her cell, equipped with two bunks*, a sink*, a small table, a window and a metal toilet.

Whitmore has said Hilton would be treated like any other prisoner at the jail, which houses roughly 2,200 women. But she has been separated from the general population in a “special-needs” unit designed for famous prisoners.

The star of reality TV’s “The Simple Life” will have to stay in her cell 23 hours a day, with an hour each day outside her cell to stretch her legs, take a shower, use the telephone or watch television in a jailhouse day room.

(SD-Agencies)