Nicole Richie will serve her jail term at the same prison, Lynwood, where former BFF Paris Hilton servered her 23 day sentence.

Richie had the option of serving her 90 hours at a “private jail.” These facilities are nicer than Lynwood, for sure, but there’s a downside. When an inmate does time at a private facility, they must serve out the entire sentence. At Lynwood, the Sheriff could turn a 4-day sentence into a revolving door, because of the overcrowding problem.

Even if Nicole didn’t go in and out, she would do much less than 4 days. She could enter Lynwood late one evening (as Paris did) and she’d get credit for an entire day. On top of that, there’s “good time” credit that would shave a significant portion of the sentence.

So it looks like Nicole could serve possibly just one full day in the slammer.