Shortly after Britney checked in and out and in and out of rehab, she had another obstacle to face. According to People, Kevin Federline was granted an emergency hearing this morning to discuss the custody battle over their two boys, Sean Preston and Jayden James. But according to TMZ, that hearing has been canceled because Britney has checked herself BACK into rehab, for the third time!

Both Federline and his attorney, Mark Vincent Kaplan, were scheduled to appear in a Los Angeles court today to discuss the well being of Britney and their two children.

TMZ is also reporting that this is Spears' last chance. If she leaves the inpatient rehab program (lasting 30-45 days) again before receiving full treatment, Federline will go to court and seek orders granting him unquestioned full custody of the children. Rumor has it that the boys are in good hands and have been with their father, Kevin, since last week. Britney showed up at Federline's house last night, but he wouldn't let her in.

Posted 11:40am EST 02-22-2007