LISA RICHWINE JAMIE Spears, the father of Britney Spears, on Tuesday, asked a Los Angeles court to end the pop singer's 13-year conservatorship, saying circumstances have changed in recent months. In an unexpected development, Jamie Spears, who in 2008 set up the court-sanctioned arrangement that governs the singer's personal and business affairs, said in a court filing that he believed the judge should "now seriously consider whether this conservatorship is no longer required." "If Ms Spears wants to terminate the conservatorship and believes that she can handle her own life, Mr Spears believes she should get that chance," read the…