"Extra" has obtained new court papers from Britney Spears' ongoing custody battle with Kevin Federline.
The papers stem from Thursday's emergency hearing, in which the judge ordered Brit to answer calls from the drug-testing lab. The court is requesting that Brit confirm her contact number - and not lose it!
Yesterday K-Fed's lawyer argued that Britney had missed eight of the 14 calls from the drug-testing lab. Brit's lawyer, however, countered that she often sleeps in late and requested more time for Brit to return the calls.