How Britney's Second Psychiatric Hold Went Down

TMZ has broken story after story in the middle of the night, detailing the second commitment of Britney Spears that occurred in the last few hours. For all of you who have just logged on, here's a summary:

Last night, Britney's new psychiatrist went to her home and felt she was a danger to herself and others -- partly because of her reckless driving and partly because of her "downhill behavior." As a result, the shrink launched a plan (days in the making) to have Britney committed to UCLA Medical Center by calling the cops.

Sources tell us the cops knew it was coming. In fact, the plan was for cops and paramedics to take Britney away the night before, but it was scrubbed. Last night, it all went down according to plan. Cops even used code to minimize craziness in transporting Britney to the hospital. Over the police radio, she was referred to as "The Package."

Before the cops arrived, the shrink told her she was going back to the hospital and she offered no resistance. She said, "Is something wrong?" She made hot chocolate and waited. Her mom, Lynne, got extremely agitated, accusing Sam of engineering the impending commitment. We're told Brit told her to "shut the hell up." She demanded silence, sat on the floor and wrote notes to people who were there as they waited. When emergency personnel arrived, Brit went on the gurney without resistance.

When everyone arrived at UCLA, things got heated. Jamie Spears began screaming at Sam Lutfi, accusing him of trying to control Britney. We're told as far as the doctors are concerned -- at least for now -- Lynne and Jamie Spears are not calling the shots. The point guy for the docs is Brit's friend, Sam Lutfi.

Sources say after Britney's commitment earlier this month, she was extremely upset at her dad for getting angry at Sam and the hospital staff. Britney had lawyers draft several documents, however, we're told she did not sign a durable power of attorney giving Lutfi the power to make medical decisions on her behalf. Nevertheless, something was signed and doctors are going to Lutfi for guidance. Jamie went off on Lutfi in the hallway, accusing him of trying to control his daughter.

Britney has been calm in the hospital, even getting a "cigarette break."

We're told during the initial 72-hour stay she cannot be forced to take medication against her will. If, however, she refuses to take the meds, the plan is for the psychiatrist to go to court and have Britney held for an additional 14 days, during which time he could administer proper medications.

As TMZ first reported, Britney has already been diagnosed with a bipolar disorder and has sporadically taken her medication. But one source says the meds just aren't doing the trick.

Oh, and get this. Lynne Spears drove to the hospital tonight with Brit's pap friend Adnan!