Source: Britney Went “Completely Psycho” on Hospital Gurney  —  Britney Spears went “completely psycho” as she was rushed to L.A.'s Cedars-Sinai Thursday, a source tells Usmagazine.com.  —  “They had to strap her down like a mental patient and she was going between laughing and hysterics …

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.

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.

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.

Police: Britney Being Taken for ‘An Evaluation’  —  Britney Spears is being taken for “an evaluation” after police were called to her Studio City home for a “custodial dispute” Thursday, according to police.  —  At around 8 p.m. police responded to a call “about a custodial dispute regarding …

Britney Spears on Suicide Watch  —  Britney Spears was admitted to Cedars Sinai hospital in L.A. early this morning following a dramatic evening in which cops were called to her home after she refused to hand her two sons back to her ex-husband Kevin Federline.

Brit/K-Fed Lawyers Hash It Out in Court  —  K-Fed's lawyer, Mark Vincent Kaplan and Brit's attorney, Tara Scott, have been meeting with the Commish in chambers about Britney's meltdown.  We're now told they have left, but will be back in court at 1:30 PM PT today.