AceShowbiz -

Britney Spears failed several drug tests because she's a pop star with a No. 1 album to promote, the singer's camp argued Thursday November 8th during the latest hearing on her custody battle with ex-husband Kevin Federline over their young sons, Sean Preston and Jayden James. But the judge gave no excuse and ordered the well yes, pop star, to provide a single, working telephone number to be called in for drug testing.

Spears' legal team said during the hearing that the pop star had undergone 10 drug screenings, and had passed every one. K-Fed's legal team, on the other hand, claimed the pop star showed up for only six of 14 requested tests. On her allegedly missing the rest 8 drug tests, the pop star's attorney Anne Kiley argued that Spears hadn't responded within an hour, as ordered by the court, because she was sleeping, and asked that she be given a six hour time-frame instead.

The attorney moreover required the court to take into account Spears' pop star status due to which she is often out late at night, and frequently asleep when the drug-test lab rings in the morning. Superior Court Commissioner Scott Gordon, however, refused to grant an excuse, claimed time wasn't the problem, noting that Spears had lost telephone numbers and changed numbers.

But, as explained by Kiley, Spears frequently changes her phone number because her number often falls into the wrong hands.

Commissioner Gordon, in fact, said he didn't care how many times Spears changes her number as long as she properly informs all lawyers involved and the drug testing facility. "There needs to be one number that the testing facility calls that she responds to," Gordon ruled, adding that he won't make any further modifications to existing custody orders.

Under those orders, Federline has temporary custody of sons while Spears gets one overnight visit and two daytime visits a week.