Pop star Britney Spears was charged in California on Thursday for driving under the influence of drugs and alcohol, the Associated Press reported. The 44-year-old faces a single misdemeanor count of driving under the combined influence of alcohol and at least one drug, authorities said. Police did not specify the type of drug she had taken. On March 4, the California Highway Patrol arrested Spears on suspicion of D.U.I. after officers observed her driving erratically and at a high rate of speed. Spears was the “solo occupant” of the vehicle and “showed signs of impairment and submitted to a series of field sobriety tests.” In April, Spears, at the urging of family and loved ones, voluntarily checked herself into a treatment center, according to NBC. “Whether or not Ms. Spears will appear at the hearing will be a decision made between her and her attorney,” the Ventura County District Attorney’s office said in a statement. “Since it is a misdemeanor charge, she is not required to attend, and her attorney can make the appearance for her.” Spears is set to be arraigned next Monday in Ventura County Superior Court.