Britney Spears is on a death watch, after attempting to hold her children hostage in a 3-hour stand-off with police.

Here’s a pretty good “recap” of what happened last night, for those of you who want to get caught up quickly:

7 p.m.: Britney is scheduled time to hand over custody of Sean Preston, 2, and Jayden James, 15 months, to Kevin Federline’s bodyguard.

8:30 p.m.: Police arrive at Spears’ Beverly Hills home after being called about a “custodial dispute,” LAPD officer Jason Lee said. Shortly after, Federline’s lawyer, Mark Vincent Kaplan, arrives.

9 p.m.: Kaplan leaves Spears’ home. Spears’ lawyer — who filed a request to be released from representing the pop star Wednesday — Sorrell Trope, tells Us: “In a normal case when someone shows up with a certified court order saying the kids need to be somewhere else, the police see to it that the order is obeyed. But that is in a normal case.”

10:08 p.m.: News helicopters hover over Spears’ home. Officer Jason Lee of the Los Angeles Police Department told City News Service that Spears appeared to be under the influence of an “unknown substance.”

10:50 p.m.: The fire department arrives. LAPD Officer Jason Lee tells Us: “The officers are still there. They are trying to resolve this peacefully and legally, according to the court order. They’ve been there since 8 p.m., and it is in regards to Britney Spears’ custody battle.”

11:05 p.m.: Paramedics take a gurney and a backboard into Spears’ home. CBS reports a mental evaluator was also called.

11:25 p.m.: An ambulance pulls into Spears’ driveway, parking behind her car.

11:50 p.m.: An ambulance carrying Spears and other emergency vehicles leave the scene; it’s reported that Sean Preston and Jayden James are taken to Cedars Sinai as well to be evaluated.

12:40 a.m.: Spears arrives, via ambulance, at Cedars-Sinai Medical Center in L.A. (Police had erected screens to shield her from waiting photographers.) Federline and Spears pal Sam Lufti soon arrive separately. Around time of mom’s arrival, son Jayden, sucking on a pacifier, is carried into the emergency room by a police officer.

1:10 a.m.: Britney’s father Jamie arrives.

3:45 a.m.: A hospital source confirms that Spears remains under observation as a “special needs” patient.

4:15 a.m.: Paparazzi follow a car carrying Jayden James and Sean Preston to Federline’s Tarzana home.

source: TIMELINE: Britney’s Trip to the Hospital [us magazine]