A judge has rejected an appeal by rap star DMX to overturn his 15-day jail sentence on a traffic charge, reports the Associated Press. DMX (real name: Earl Simmons) was pulled over by police after a tour stop in Buffalo in March and was charged with speeding, failing to signal a lane change, driving with a suspended permit and marijuana possession. The musician pleaded guilty to a reduced charge (of driving without a license), was fined $400 and ordered to serve a maximum 15-day jail term. He is expected to surrender within the next two weeks to serve time in the Erie County Correctional Facility in Alden, N.Y.