Britney Spears was released from custody after being arrested for driving under the influence in Ventura County while driving a BMW erratically.Her manager Cade Hudson described the incident as inexcusable while ex-husband Jason Alexander noted her blood alcohol level was below the legal limit.California Highway Patrol officers detained the singer following reports of high-speed maneuvers and signs of impairment on the freeway.The singer is scheduled for a court appearance on May 4 as her legal team prepares for potential charges involving alcohol and prescription drugs.