Britney Spears is back in rehab again after Kevin Federline has taken a stand and threatened to go to court to take her kids away. Spears quit the Promises Treatment Center less than 24 hours after arriving and hid out in a hotel with a friend. But last night K-Fed called for an emergency hearing regarding the custody of their two children and gave Britney an ultimatum "Go back to rehab right now and I wont go to court today." The ultimatum comes after Spears drove out to K-Fed's house and banged on his door for twenty minutes, screaming into the intercom "I know you're in there. Open the door, I need to talk, let me in." After no response she drove around the block and came back to repeat the process 5 times. One can only hope that Britney has come to her senses and that she gets the help she needs. Congrats to Kevin for taking a stand. I would have never guessed he was going to be the voice of reason.