Lindsay Lohan seems to have had the last laugh as she checked in and out of prison in just 4 hours at Century Regional Detention Facility (Lynwood, California). She was supposed to spend 30 days sentence at the jail but was released early from an overcrowded jail Monday morning after serving just over four hours starting at 9 Sunday night.

“All I can tell you is that she was already released,” L.A. Sheriff’s Deputy Tony Moore told PEOPLE early Monday morning.

A sheriff’s spokesman previously explained that Lohan could be sprung early due to a federal mandate to ease the overpopulated jail. Nonviolent offenders are routinely sent home early after serving only a fraction of their sentences.

Lohan, 25, had checked herself into the Century Regional Detention Facility in Lynwood, Calif., after she was sentenced to 30 days in jail last week after admitting she violated probation in her DUI and necklace-theft cases. Source:

For now, she has to work an additional 53 days of janitorial duty at the L.A. morgue and attending 18 more psychotherapy sessions, all by the end of March 2012. Next slipup can result in 270 days of prison time, but who knows, “overcrowding at prison” might help her again!