Britney Spears by John Sciulli/ Britney Spears by John Sciulli/

The latest and potentially most fruit-bearing subpoena served by Kevin Federline's lawyers in his brewing custody battle with ex-wife Britney Spears was served to the administrator of the Promises rehab center where Brit retreated to and supposedly got set straight following that whole head-shaving, umbrella-wielding meltdown. Though doctors and nurses who treated Spears are protected by doctor-patient confidentiality, it is believed that such insulation does not extend to the facility's manager.

This represents the fourth subpoena issued by K-Fed's team, following the serving of Spears' former assistant Shannon Funk, bodyguard Daimon Shippen and cousin/confidante Alli Sims.

O.J. shmojay. This is what live courtroom coverage was invented for.