Britney Spears has voluntarily checked herself into rehab, a representative for the singer confirmed to Rolling Stone and Variety . Last month, the pop star was arrested on suspicion of driving under the influence and booked into California’s Ventura County Main Jail; she was released a few hours later and given a court date. Pitchfork has reached out to Spears’ spokesperson for comment. On March 4, Spears was arrested by the California Highway Patrol at 9:30 p.m. after officers received a call