Britney on 72-Hour Mental Lockdown  —  Britney Spears was placed on lockdown for a mental evaluation Friday after the pop star locked herself in a room with one of her children at her L.A. home and refused to hand him over to ex-husband Kevin Federline.  —  A source tells PEOPLE …

EXCLUSIVE: Britney not on drugs!  —  Life & Style can exclusively report that Britney Spears blood tests at Cedars-Sinai Medical Center came back negative, despite earlier reports from police that she appeared to be under the influence of a substance when she was taken from her home after a custody dispute last night.

Britney Wheeled Out on a Gurney!!  —  OMG THE DRAMA!  TMZ is there as Britney Spears was just wheeled out of her home on a gurney by paramedics.  Look at that shot of her inside the ambulance — she's frickin' smiling!  Why God, why?!?  —  Once in the ambulance, paramedics can be seen trying …

Hospital Source on Britney: “None of Us Wanted to Go Sit With Her”  —  An insider at L.A.'s Cedars-Sinai Medical Center tells Usmagazine.com that nobody wanted to be Britney Spears' monitor last night.  —  Spears was rushed to the hospital around 11 p.m. and was designated a “special needs” …

Breaking: Tearful Brit Hospitalized After Police Standoff!  —  UPDATES: Britney arrived at Cedars-Sinai Medical Center at approximately 12:30am PT. “She was sobbing as she was taken out of her house on a gurney,” a witness tells OK!.  When she arrived at the hospital, she had managed …

Britney Spears Designated a “Special Needs” Patient on 72-Hour Lockdown  —  After a reportedly intoxicated Britney Spears was rushed to L.A.'s Cedars-Sinai Medical Center Thursday, the singer was designated a “special needs” patient," meaning “they have either overdosed or tried to commit suicide …

Police Called as Britney Spears Refuses to Turn Over Children  —  Britney Spears is defying court-mandated custody hours by refusing to turn over her sons to ex-husband Kevin Federline.  —  The pop star was due to turn over Sean Preston, 2, and Jayden James, 1, at 7 p.m. PST.

Britney Spears' Son Released from Hospital to Kevin Federline  —  Sources tell Usmagazine.com that Britney Spears' son, Jayden James, was released from L.A's Cedars-Sinai Medical Center shortly after 4 a.m. PST Friday.  —  He was with Kevin Federline's bodyguard.  Their car was being followed by the paparazzi at 4:15 a.m.

Britney's Bathroom Standoff  —  Details of what actually happened inside Britney Spears' Beverly Hills home have begun to emerge and they are, in a word, disturbing.  —  According to reports, when Kevin Federline's bodyguard showed up to collect Sean Preston and Jayden James …

K-Fed's Lawyer Headed to Court  —  TMZ has learned K-Fed's lawyer, Mark Vincent Kaplan, will scurry to court this morning at 8:30 AM and ask the Commissioner to strip Brit of her visitation rights — at least for now.  We're told there may not be much of an argument and it's almost certain the Commish will see Kaplan's point.

More Cops, Ambulance Now at Spears' House!  —  UPDATE: Another ambulance, more fire trucks and several additional police cars have just rolled up to Britney's house.  One person on the ground described the situation to us as “scary."  —  Holy Kramer vs. Kramer!

TIMELINE: Britney Spears' Trip to the Hospital  —  After Britney Spears defied court-mandated visitation hours Thursday night by refusing to turn over her two sons to ex-husband Kevin Federline, police were called to her home.  Later a reportedly intoxicated Spears was taken via ambulance to L.A.'s Cedars-Sinai Medical Center.

Britney Spears In Involuntary Psychiatric Hold; Lynne Spears Crying; Emergency Custody Hearing Now Over  —  UPDATED (9:49 AM PST) — LA Superior Court confirms to Access that there was an emergency Federline / Spears custody hearing this morning at 8:30 AM.  Mark Vincent Kaplan …

Kevin Federline's Lawyer Holds Emergency Hearing in Custody Case  —  Hours after Britney Spears was rushed to the hospital on a gurney, Kevin Federline's lawyer, Mark Vincent Kaplan called an emergency meeting in the couple's ongoing custody battle Friday morning at L.A. Superior Court.