http://news.bbc.co.uk/1/hi/entertainment/6731143.stm
Celebrity heiress Paris Hilton has been released from jail after serving just three full days of her sentence.
But she will be kept under house arrest and must wear an electronic tag for another 40 days.
The decision was made as a result of a medical problem, but officials refused to give details of the condition.
When Hilton was originally sentenced to 45 days for violating probation on a drink-driving conviction, she was told there was no prospect of early release.
The sentence was later cut in half after being given credit for good behaviour.
Hilton has now been "reassigned" to house arrest 20 days before her revised jail term was due to end.
She will be "confined to her home" and must wear an ankle bracelet, according to Steve Whitmore of the Los Angeles County Sheriff's Department.
He said she would not be allowed out for parties or social functions.
Her full sentence - including the house arrest - has now reverted to the original 45 days.
Paris Hilton was in a special unit reserved for high-profile inmates
The authorities said she had officially served five days in jail - including Sunday night and the early hours of Thursday morning - meaning 40 days of house arrest will complete the sentence.
She had been held at the Century Regional Detention Centre in Lynwood, California.
The 26-year-old Simple Life star was separated from the main prison population in a block containing 12 cells, each holding two people.
It is reserved for celebrities, public officials, police officers and other high-profile inmates.
The heiress-turned-pop singer was arrested for driving under the influence last September and was issued probation, which she violated several times by driving with a suspended licence.
Jumpsuit
Before turning herself in to authorities on Sunday, she told reporters: "I'm definitely scared, but I'm ready to face my sentence."
Hilton was accompanied by her mother as she arrived at the jail. She was then fingerprinted, photographed, medically screened and issued with the jail's regulation orange jumpsuit.
After her first night in jail, her lawyer said she was doing well and would "reflect on her life, to see what she can do to make the world better".
Richard A Hutton said his client was "really being punished because of her celebrity".
Steve Whitmore, of the Los Angeles County Sheriff's Department, said after she was admitted: "Her demeanour was helpful. She was focused, she was co-operative."