Another reality TV star is headed for the slammer. Khloe Kardashian, younger sister to Kim and a star on Keeping Up With the Kardashians, admitted to violating her probation from a 2007 DUI arrest. Khloe was ordered by a Los Angeles Superior Court judge to surrender to authorities this Friday and serve up to 30 days in prison. She also has to enroll in an alcohol treatment program within three weeks of her release and will remain on probation. "Khloe is ready and willing to serve out her sentence, no matter how long and where, and have this resolved," her publicist told The Associated Press.