Britney Spears has passed her first court-imposed drug test with flying colours. The troubled pop star, who is required to undergo testing under the terms of her ongoing child custody battle with ex-husband Kevin Federline, took the test this weekend (06/07Oct07), according to website TMZ.com. Sources also claim the singer spent the weekend with her two young sons, Sean Preston and Jayden James, and a parenting coach, who will determine whether the Toxic singer is fit to be a mother. Spears lost physical custody of her sons last week (ends05Oct07) after Federline's attorney revealed the singer was snubbing her nose at a series of court-imposed demands in the case.