Following in the footsteps of her Simple Life co-star, Paris Hilton, Nicole Richie has been sentenced to serve four days in jail for driving under the influence and given three years probation. At the time of her arrest, Richie admitted to police that she had smoked marijuana and had taken Vicodin, a prescription painkiller, though no drugs or alcohol were found on her or in the car. Nicole, who attended court on the arm of her boyfriend, Joel Madden, was told to serve her time by September 28th. She was also fined $2,048 and ordered to attend a rehab program for second time offenders. If she violates the terms and conditions of her sentence, she’ll have to serve up to a year in county jail.